All-solid-state battery

Abstract

An all-solid-state battery according to an embodiment includes a laminate including a positive electrode layer, a solid electrolyte layer, and a negative electrode layer; a first external electrode disposed outside the laminate and connected to the positive electrode layer; and a second external electrode disposed outside the laminate and connected to the negative electrode layer, in which the laminate includes a first curved surface having a circular or elliptical arc shape, a second curved surface having a circular or elliptical arc shape and facing the first curved surface in a first direction, and an end surface disposed in a second direction extending to intersect the first direction between the first curved surface and the second curved surface, an outer angle formed by the end surface with the second direction is acute, an outer angle formed by the end surface with the first curved surface is acute, and an outer angle formed by the end surface with the second curved surface is obtuse.

Description

ALL-SOLID-STATE BATTERY

[0001] The present disclosure relates to an all-solid-state battery.

[0002] Lithium-ion batteries currently on the market use electrolyte solutions containing flammable organic solvents, so there is a risk of overheating and fire in the event of a short circuit. Accordingly, an all-solid-state battery using a solid electrolyte instead of an electrolyte solution has been proposed.

[0003] Recently, wearable electronic devices have become widespread, and all-solid-state batteries that can be mounted on wearable electronic devices of various shapes are in demand.

[0004] The present disclosure attempts to provide an all-solid-state battery that can be mounted in a ring-shaped wearable electronic device.

[0005] However, the problems to be solved by embodiments of the present invention are not limited to the above-described problems, and can be variously expanded within the scope of the technical spirit included in the present invention.

[0006] An all-solid-state battery according to an embodiment includes a laminate including a positive electrode layer, a solid electrolyte layer, and a negative electrode layer; a first external electrode disposed outside the laminate and connected to the positive electrode layer; and a second external electrode disposed outside the laminate and connected to the negative electrode layer, in which the laminate includes a first curved surface having a circular or elliptical arc shape, a second curved surface having a circular or elliptical arc shape and facing the first curved surface in a first direction, and an end surface disposed in a second direction extending to intersect the first direction between the first curved surface and the second curved surface, an external angle formed by the end surface with the second direction is acute, an external angle formed by the end surface with the first curved surface is acute, and an external angle formed by the end surface with the second curved surface is obtuse.

[0007] The laminate may have a curvature.

[0008] The first curved surface may have a first radius of curvature, and the second curved surface may have a second radius of curvature.

[0009] The first radius of curvature may be greater than the second radius of curvature.

[0010] When viewed in a third direction intersecting both the first direction and the second direction, the first surface and the second surface may form portions of concentric circles.

[0011] The positive electrode layer, the solid electrolyte layer, and the negative electrode layer may each have a curvature corresponding to that of the laminate.

[0012] The end surface may include a first end surface and a second end surface disposed opposite each other in the second direction, the first external electrode may be disposed on the first end surface, and the second external electrode may be disposed on the second end surface.

[0013] The laminate may include a third surface and a fourth surface disposed opposite each other in a third direction intersecting both the first direction and the second direction, the first external electrode may extend from the first end surface and cover a portion of the third surface and a portion of the fourth surface, and the second external electrode may extend from the second end surface and cover a portion of the third surface and a portion of the fourth surface.

[0014] The positive electrode layer, the solid electrolyte layer, and the negative electrode layer may be stacked in the first direction.

[0015] The positive electrode layer, the solid electrolyte layer, and the negative electrode layer may be stacked in a third direction intersecting both the first direction and the second direction.

[0016] An all-solid-state battery according to another embodiment includes a laminate including a positive electrode layer, a solid electrolyte layer, and a negative electrode layer; a first external electrode disposed outside the laminate and connected to the positive electrode layer; and a second external electrode disposed outside the laminate and connected to the negative electrode layer, in which the laminate includes a first curved surface having a circular or elliptical arc shape, a second curved surface having a circular or elliptical arc shape and facing the first curved surface in a first direction, and a first end surface and a second end surface disposed opposite each other in a second direction extending to intersect the first direction between the first curved surface and the second curved surface, and when viewed in a third direction intersecting both the first direction and the second direction, the first end surface and the second end surface are disposed on the same straight line.

[0017] The laminate may have a curvature.

[0018] The first curved surface may have a first radius of curvature, and the second curved surface may have a second radius of curvature.

[0019] The first radius of curvature may be greater than the second radius of curvature.

[0020] The first external electrode may be disposed on the first end surface, and the second external electrode may be disposed on the second end surface.

[0021] An all-solid-state battery according to still another embodiment includes a laminate including a positive electrode layer, a solid electrolyte layer, and a negative electrode layer; a first external electrode disposed outside the laminate and connected to the positive electrode layer; and a second external electrode disposed outside the laminate and connected to the negative electrode layer, in which the laminate includes a first curved surface having a circular or elliptical arc shape, a second curved surface having a circular or elliptical arc shape and facing the first curved surface in a first direction, and a first end surface and a second end surface disposed opposite each other in a second direction extending to intersect the first direction between the first curved surface and the second curved surface, and when viewed in a third direction intersecting both the first direction and the second direction, an extension line of the first end surface is orthogonal to an extension line of the second end surface.

[0022] The laminate may have a curvature.

[0023] The first curved surface may have a first radius of curvature, and the second curved surface may have a second radius of curvature.

[0024] The first radius of curvature may be greater than the second radius of curvature.

[0025] The first external electrode may be disposed on the first end surface, and the second external electrode may be disposed on the second end surface.

[0026] The all-solid-state battery according to the embodiment may be mounted in a ring-shaped wearable electronic device.

[0027] FIG. 1 is a perspective view schematically showing an all-solid-state battery according to an embodiment.

[0028] FIG. 2 is a plan view showing the all-solid-state battery of FIG. 1.

[0029] FIG. 3 is a perspective view schematically showing the laminate of FIG. 1.

[0030] FIG. 4 is a plan view of FIG. 3.

[0031] FIG. 5 is a side view of FIG. 3.

[0032] FIG. 6 is another side view of FIG. 3.

[0033] FIG. 7 is a cross-sectional view taken along arc I-I' of FIG. 2.

[0034] FIG. 8 is a cross-sectional view taken along arc II-II' of FIG. 2.

[0035] FIG. 9 is a partial cross-sectional view schematically showing a positive electrode layer of the all-solid-state battery of FIG. 1.

[0036] FIG. 10 is a partial cross-sectional view schematically showing a negative electrode layer of the all-solid-state battery of FIG. 1.

[0037] FIG. 11 is a cross-sectional view schematically showing the positive electrode layer of the all-solid-state battery of FIG. 1.

[0038] FIG. 12 is a cross-sectional view schematically showing the negative electrode layer of the all-solid-state battery of FIG. 1.

[0039] FIG. 13 is a perspective view schematically showing an all-solid-state battery according to another embodiment.

[0040] FIG. 14 is a perspective view schematically showing the laminate of FIG. 13.

[0041] FIG. 15 is a cross-sectional view schematically showing the all-solid-state battery of FIG. 13.

[0042] FIG. 16 is a perspective view schematically showing an all-solid-state battery according to still another embodiment.

[0043] FIG. 17 is a plan view showing the all-solid-state battery of FIG. 16.

[0044] FIG. 18 is a perspective view schematically showing the laminate of FIG. 16.

[0045] FIG. 19 is a plan view of FIG. 16.

[0046] FIG. 20 is a perspective view schematically showing an all-solid-state battery according to yet another embodiment.

[0047] FIG. 21 is a plan view of FIG. 20.

[0048] FIG. 22 is a plan view schematically showing the laminate of FIG. 20.

[0049] FIG. 23 is a perspective view schematically showing a ring-shaped wearable electronic device mounted with an all-solid-state battery according to an embodiment.

[0050] In the following detailed description, only certain embodiments of the present invention have been shown and described, simply by way of illustration. The drawings and description are to be regarded as illustrative in nature and not restrictive. Like reference numerals designate like elements throughout the specification. Further, some constituent elements in the drawing may be exaggerated, omitted, or schematically illustrated, and a size of each constituent element does not reflect the actual size entirely.

[0051] The accompanying drawings are provided for helping to easily understand embodiments disclosed in the present specification, and the technical spirit disclosed in the present specification is not limited by the accompanying drawings, and it will be appreciated that the present invention includes all of the modifications, equivalent matters, and substitutes included in the spirit and the technical scope of the present invention.

[0052] Terms including an ordinary number, such as first and second, are used for describing various constituent elements, but the constituent elements are not limited by the terms. The terms are used only to discriminate one constituent element from another constituent element.

[0053] Further, it will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. Further, when an element is "on" a reference portion, the element is located above or below the reference portion, and it does not necessarily mean that the element is located "above" or "on" in a direction opposite to gravity.

[0054] Throughout the specification, it will be appreciated that terms "including" and "having" are intended to designate the existence of characteristics, numbers, steps, operations, constituent elements, and components described in the specification or a combination thereof, and do not exclude a possibility of the existence or addition of one or more other characteristics, numbers, steps, operations, constituent elements, and components, or a combination thereof in advance. Therefore, unless explicitly described to the contrary, the word "comprise", and variations such as "comprises" or "comprising", will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

[0055] Further, throughout the specification, when it is referred to as "on a plane", it means when a target part is viewed from above, and when it is referred to as "on a cross-section", it means when the cross section obtained by cutting a target part vertically is viewed from the side.

[0056] Further, throughout the specification, when it is referred to as "connected", this does not only mean that two or more constituent elements are directly connected, but may mean that two or more constituent elements are indirectly connected through another constituent element, are physically connected, electrically connected, or are integrated even though two or more constituent elements are referred as different names depending on a location and a function.

[0057] FIG. 1 is a perspective view schematically showing an all-solid-state battery according to an embodiment, FIG. 2 is a plan view showing the all-solid-state battery of FIG. 1, and FIG. 3 is a perspective view schematically showing a laminate of FIG. 1. FIG. 4 is a plan view of FIG. 3, FIG. 5 is a side view of FIG. 3, and FIG. 6 is another side view of FIG. 3.

[0058] Referring to FIGS. 1 and 2, an all-solid-state battery 1000 according to the present embodiment includes a laminate 100, a first external electrode 200, and a second external electrode 300.

[0059] Referring to FIGS. 3 to 6, the laminate 100 may have a partial doughnut or partial ring shape and may include a solid electrolyte layer 110, a positive electrode layer 130, and a negative electrode layer 150.

[0060] The laminate 100 is a structure made by stacking the solid electrolyte layer 110, the positive electrode layer 130, and the negative electrode layer 150 in a z-direction, and has a shape that is curved about the z-direction. That is, the laminate 100 has a curvature by being curved in a direction intersecting the z-direction.

[0061] Here, the z-direction may be a direction perpendicular to a wide surface (main surface) of components having a sheet shape. For example, the z-direction may be used as the same concept as the direction in which the components of the laminate 100 are stacked.

[0062] The laminate 100 includes a first surface S1, a second surface S2, a third surface S3, a fourth surface S4, a fifth surface S5, and a sixth surface S6.

[0063] The first surface S1 and the second surface S2 oppose each other in the z-direction. That is, the first surface S1 and the second surface S2 are disposed opposite each other in the z-direction.

[0064] The third surface S3 is a curved surface that connects the first surface S1 and the second surface S2, and the fourth surface S4 is another curved surface that connects the first surface S1 and the second surface S2. Here, for convenience of description, a direction of an arbitrary straight line that is substantially perpendicular to the z-axis direction and simultaneously passing through the third surface S3 and the fourth surface S4 is defined as "a first direction". Accordingly, the third surface S3 and the fourth surface S4 may be disposed opposite each other in the first direction. For example, when the fourth surface S4 has an arc shape, a direction along the straight line R-R' passing through its center O may be the first direction. However, in the following, the "first direction" may be referred to as a "radial direction" as needed.

[0065] When viewed in the z-direction, the third surface S3 and the fourth surface S4 of the laminate 100 may have a curvature, respectively. That is, the third surface S3 may have a first radius of curvature and the fourth surface S4 may have a second radius of curvature. The first radius of curvature may be greater than the second radius of curvature.

[0066] For example, when viewed in the z-direction, the third surface S3 and the fourth surface S4 may each have a circular arc shape or an elliptical arc shape. As another example, the third surface S3 and the fourth surface S4 may form portions of concentric circles.

[0067] Here, for convenience of description, a direction following an imaginary curved surface (or curve) (C-C') extending to simultaneously cross the z-axis direction and the radial direction between the third surface S3 and the fourth surface S4 of the laminate 100 is defined as a "second direction"." However, in the following, the "second direction" may be referred to as a "circumferential direction" as needed.

[0068] Meanwhile, the z-direction is a direction intersecting both the first direction and the second direction and may correspond to a "third direction".

[0069] The fifth surface S5 and the sixth surface S6 may be both end surfaces of the laminate 100 in the circumferential direction. That is, the fifth surface S5 and the sixth surface S6 may be disposed opposite each other in the circumferential direction.

[0070] Referring to FIG. 4, an outer angle θ1 formed by the fifth surface S5 with the circumferential direction may be acute, and an outer angle θ2 formed by the sixth surface S6 with the circumferential direction may be acute. An outer angle θ3 formed by the fifth surface S5 with the third surface S3 may be acute, and an outer angle θ4 formed by the fifth surface S5 with the fourth surface S4 may be obtuse. In addition, an outer angle θ5 formed by the sixth surface S6 with the third surface S3 may be acute, and an outer angle θ6 formed by the sixth surface S6 with the fourth surface S4 may be obtuse.

[0071] According to the present embodiment, an area where the fifth surface S5 is in contact with the first external electrode 200 and an area where the sixth surface S6 is in contact with the second external electrode 300 are larger compared to the case where the outer angles formed by the fifth surface S5 and the sixth surface S6 with the circumferential direction are right angles. Therefore, the first external electrode 200 and the second external electrode 300 can be more strongly bonded to the laminate 100. Accordingly, the connection between the positive electrode layer 130 and the first external electrode 200 can be enhanced, and the connection between the negative electrode layer 150 and the second external electrode 300 can be enhanced.

[0072] FIG. 7 is a cross-sectional view taken along arc I-I' of FIG. 2, and FIG. 8 is a cross-sectional view taken along arc II-II' of FIG. 2.

[0073] Referring to FIGS. 3 and 5 to 8, the laminate 100 may include a solid electrolyte layer 110, a positive electrode layer 130, a negative electrode layer 150, an upper protective layer 160, a lower protective layer 170, and a margin portion 180.

[0074] The solid electrolyte layer 110, the positive electrode layer 130, and the negative electrode layer 150 may each be plural. The positive electrode layers 130 and the negative electrode layers 150 may be alternately stacked in the z-direction with the solid electrolyte layers 110 interposed therebetween. The stacked structure may be repeated within the laminate 100, and the electrode layer closest to the first surface S1 of the laminate 100 may be the positive electrode layer 130 or the negative electrode layer 150, and the electrode layer closest to the second surface S2 may be the negative electrode layer 150 or the positive electrode layer 130.

[0075] The positive electrode layer 130 may be disposed on one surface of the solid electrolyte layer 110, and the negative electrode layer 150 may be disposed on the other surface of the solid electrolyte layer 110.

[0076] The solid electrolyte layer 110 includes a solid electrolyte. The solid electrolyte may serve as a passage for lithium (Li) ions.

[0077] The solid electrolyte included in the solid electrolyte layer 110 may include a glass-ceramic electrolyte including lithium halide (halogen elements such as LiX, X=F, Br, Cl, and I). The glass-ceramic (or crystallization glass) refers to a crystallographic mixture of amorphous and crystalline materials from which peaks and halos are observed in X-ray diffraction, electron beam diffraction, etc. Thus, the glass-ceramic-based electrolyte is an electrolyte that has undergone partial crystallization through sintering and in which amorphous and crystalline materials are mixed.

[0078] The glass-ceramic-based electrolyte may include a mixture of an amorphous material and two or more types of crystalline materials. In addition, the crystalline material included in the glass-ceramic-based electrolyte may include a lithium compound crystalline phase containing lithium.

[0079] When the glass-ceramic-based electrolyte is part of the solid electrolyte layer 110, sufficient densification is achieved after sintering, whereby it is possible to realize high ionic conductivity.

[0080] As an example, the glass-ceramic electrolyte may include lithium (Li) oxide, boron (B) oxide, silicon (Si) oxide, aluminum (Al) oxide, gallium (Ga) oxide, phosphorus (P) oxide, germanium (Ge) oxide, magnesium (Mg) oxide and lithium chloride (LiCl). Specifically, the glass-ceramic electrolyte may include Li2O-B2O3-SiO2-P2O5-GeO2-LiCl.

[0081] As another example, the solid electrolyte in the solid electrolyte layer 110 may contain a lithium-borosilicate-based electrolyte (hereinafter, referred to as LBSO-based electrolyte). The LBSO-based electrolyte is a glass-state electrolyte, and glass refers to a crystallographically amorphous material, from which halos are observed in the X-ray diffraction or electron beam diffraction.

[0082] When the LBSO-based electrolyte is part of the solid electrolyte layer 110, it is possible to keep the amorphous state during sintering while lowering the sintering temperature.　 Thus, there is an advantage that it is possible to realize high ionic conductivity, and reactivity with the electrode is not high. The LBSO-based electrolyte may include lithium (Li), boron (B), silicon (Si), aluminum (Al), phosphorus (P), germanium (Ge), and sulfur (S).

[0083] Alternatively, the solid electrolyte included in the solid electrolyte layer 110 may be one or more types selected from the group consisting of a Garnet-type, a Na super ionic conductor (NASICON)-type, a lithium super ionic conductor (LISICON)-type, a Perovskite-type, and a lithium phosphorus oxynitride (LiPON)-type.

[0084] In an area where the margin portion 180 to be described later is disposed, there may be a material with low ionic conductivity and low electrical conductivity, that is, an insulating material, or a material with ionic conductivity (or electrical conductivity) similar to that of the solid electrolyte. For example, when the material having ionic conductivity (or electrical conductivity) similar to that of the solid electrolyte is present in this area, the material may be the same material as the solid electrolyte in the other region or may be a different material. As another example, the material having ionic conductivity (or electrical conductivity) similar to that of the solid electrolyte and the insulating material may coexist in this area.

[0085] The Garnet-type solid electrolyte may refer to lithium lanthanum zirconium oxide (LLZO) represented by LiaLabZrcO12such as Li7La3Zr2O12, and the NASICON-type solid electrolyte may include lithium-aluminum-titanium-phosphate (LATP) of Li1+xAlxTi2-x(PO4)3(wherein 0<x<1) produced by introducing Ti to Li1+xAlxM2-x(PO4)3(LAMP) (wherein 0<x<2, M is Zr, Ti, or Ge)-type compound, lithium-aluminum-germanium-phosphate (LAGP) represented by Li1+xAlxGe2-x(PO4)3(wherein 0<x<1), such as Li1.3Al0.3Ge1.7(PO4)3containing an excessive amount of lithium, and / or lithium-zirconium-phosphate (LZP) of LiZr2(PO4)3.

[0086] In addition, the LISICON-type solid electrolyte may include solid solution oxide represented by xLi3AO4-(1-x)Li4BO4(wherein A is P, As, V, etc., and B is Si, Ge, Ti, etc.), such as Li4Zn(GeO4)4, Li10GeP2O12(LGPO), Li3.5Si0.5P0.5O4, and Li10.42Si(Ge)1.5P1.5Cl0.08O11.92, etc., and solid solution sulfide represented by Li4-xM1-yM'yS4(wherein M is Si or Ge and M' is P, Al, Zn, or Ga), such as Li2S-P2S5, Li2S-SiS2, Li2S-SiS2-P2S5, or Li2S-GeS2.

[0087] Furthermore, the Perovskite-type solid electrolyte may include lithium lanthanum titanate (LLTO) represented by Li3xLa2 / 3-x□1 / 3-2xTiO3(wherein 0<x<0.16, and □ is vacancy), such as Li1 / 8La5 / 8TiO3, and the LiPON-type solid electrolyte may include nitride such as lithium phosphorous oxynitride of Li2.8PO3.3N0.46.

[0088] The positive electrode layer 130 may be exposed outside the laminate 100 from the fifth surface S5, and may be connected to the first external electrode 200.

[0089] FIG. 9 is a partial cross-sectional view schematically showing a positive electrode layer of the all-solid-state battery of FIG. 1.

[0090] Referring to FIG. 9, the positive electrode layer 130 may include a positive electrode current collector 133, a first positive electrode active material layer 135, and a second positive electrode active material layer 136.

[0091] The positive electrode current collector 133 may be made of, for example, a plate-shaped member or a thin member. As another example, the positive electrode current collector 133 may be a porous body having a reticulate shape, a mesh shape, or the like.

[0092] The positive electrode current collector 133 may include a first surface 133a and a second surface 133b. The first surface 133a and the second surface 133b oppose each other in the z-direction.

[0093] The positive electrode current collector 133 may include, but is not limited to, a porous metal plate made of stainless steel, nickel (Ni), copper (Cu), tin (Sn), aluminum (Al), or an alloy thereof.

[0094] Additionally, the positive electrode current collector 133 may be coated with an oxidation-resistant metal or an oxidation-resistant alloy film to prevent oxidation.

[0095] The positive electrode current collector 133 may include a carbon-based plate-shaped, thin, or linear member. The positive electrode current collector 133 may include a conductive carbon material. The conductive carbon material may include graphite, conductive fiber such as carbon nanotube (CNT) or vapor grown carbon fiber (VGCF), or conductive carbon such as carbon black.

[0096] Meanwhile, the positive electrode current collector may also include one or more types of solid electrolyte.

[0097] The first positive electrode active material layer 135 and the second positive electrode active material layer 136 may include a positive electrode active material, and may be disposed on a surface of the positive electrode current collector 133. The first positive electrode active material layer 135 and the second positive electrode active material layer 136 may be formed by printing a positive electrode active material on one or both surfaces of the positive electrode current collector 133, but the method of forming the positive electrode active material layer is not limited thereto.

[0098] The positive electrode active material included in the positive electrode active material layers 135 and 136 may comprise a material containing lithium (Li) ions. The positive electrode active material may reversibly intercalate and deintercalate lithium ions. In other words, the positive electrode active material may contain lithium ions and may serve to provide the lithium ions to the negative electrode when the all-solid-state battery is charging. The positive electrode active material may affect the capacity and output of an all-solid-state battery.

[0099] For example, the positive electrode active material may include at least one selected from the group consisting of compounds represented by the following formula: LiaAl-bMbD2(where 0.90≤a≤1.8, 0≤b≤0.5); LiaEl-bMbO2-cDc(where 0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05); LiE2-bMbO4-cDc(where 0≤b≤0.5, 0≤c≤0.05); LiaNi1-b-cCobMcDα(where 0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05, 0<α≤2); LiaNi1-b-cCobMcO2-αXα(where 0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05, 0<α<2); LiaNi1-b-cCobMcO2-αX2(where 0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05,0<α<2); LiaNi1-b-cMnbMcDα(where 0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05, 0<α≤2); LiaNi1-b-cMnbMcO2-αXα(where0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05, 0<α<2); LiaNi1-b-cMnbMcO2-αX2(where 0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05, 0<α<2); LiaNibEcGdO2(where 0.90≤a≤1.8, 0≤b≤0.9, 0≤c≤0.5, 0.001≤d≤0.1); LiaNibCocMndGeO2(where0.90≤a≤1.8, 0≤b≤0.9, 0≤c≤0.5, 0≤d≤0.5, 0.001≤e≤0.1); LiaNiGbO2(where 0.90≤a≤1.8, 0.001≤b≤0.1); LiaCoGbO2(where 0.90≤a≤1.8, 0.001≤b≤0.1); LiaMnGbO2(where 0.90≤a≤1.8, 0.001≤b≤0.1); LiaMn2GbO4(where 0.90≤a≤1.8, 0.001≤b≤0.1); QO2; QS2; LiQS2; V2O5; LiV2O2; LiRO2; LiNiVO4; Li(3-f)J2(PO4)3(0≤f≤2); Li(3-f)Fe2(PO4)3(where 0≤f≤2); and LiFePO4, in the chemical formula above, A is Ni, Co, or Mn; M is Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, Nb, Ti, or a rare-earth element; D is O, F, S, or P; E is Co or Mn; X is F, S, or P; G is Al, Cr, Mn, Fe, Mg, La, Ce, Sr, or V; Q is Ti, Mo, or Mn; R is Cr, V, Fe, Sc, or Y; J is V, Cr, Mn, Co, Ni, or Cu.

[0100] The positive electrode active material may also include LiCoO2, LiMnxO2x(where x = 1 or 2), LiNi1-xMnxO2x(where 0<x<1), LiNi1-x-yCoxMnyO2(where 0≤x≤0.5, 0≤y≤0.5), LiFePO4, TiS2, FeS2, TiS3, or FeS3, but is not limited thereto.

[0101] The positive active material may optionally include a conductive material and a binder. However, because an organic substance such as a binder decomposes during sintering process, the organic material may not remain on the positive electrode active material layer of the obtained positive electrode current collector.

[0102] The conductive material is not particularly limited as long as it has conductivity without causing chemical changes in the all-solid-state battery 1000. For example, graphite such as natural graphite and artificial graphite; carbon-based materials such as carbon black, acetylene black, Ketjenblack®, channel black, furnace black, lamp black, and thermal black; conductive fibers such as carbon fibers, metal fibers, etc.; carbon fluoride; metal components such as lithium (Li), tin (Sn), aluminum (Al), nickel (Ni), copper (Cu), etc., oxides thereof, nitrides thereof, or fluorides thereof; conductive whiskers such as zinc oxide and potassium titanate; conductive metal oxides such as titanium oxide; conductive materials such as polyphenylene derivatives, etc., may be used.

[0103] The binder may be used to improve the bonding strength of the active material, the conductive material, or the like. The binder may include, but not limited to, at least one selected from the group consisting of polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, polytetrafluoroethylene, polyethylene, polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butadiene rubber (SBR), fluorine rubber, various copolymers, etc.

[0104] Meanwhile, the positive electrode layer 130 may further contain a solid electrolyte component. The solid electrolyte component may include one or more of the above-described components and may serve as an ionic conduction channel in the positive electrode layer. Therefore, it is possible to reduce interface resistance.

[0105] FIG. 11 is a cross-sectional view schematically showing the positive electrode layer of the all-solid-state battery of FIG. 1.

[0106] Referring to FIG. 11, the positive electrode layer 130 has a shape corresponding to the shape of the laminate 100. That is, the positive electrode layer 130 has a partial doughnut shape or a partial ring shape.

[0107] The edges of the positive electrode layer 130, except for the portion where the positive electrode layer 130 is connected to the first external electrode 200, may be spaced apart from the edges of the laminate 100, and the margin portion 180 is disposed in the space therebetween.

[0108] The negative electrode layer 150 may be exposed outside the laminate 100 from the sixth surface S6, and may be connected to the second external electrode 300.

[0109] FIG. 10 is a partial cross-sectional view schematically showing a negative electrode layer of the all-solid-state battery of FIG. 1.

[0110] Referring to FIG. 10, the negative electrode layer 150 may include a negative electrode current collector 153, a first negative electrode active material layer 155, and a second negative electrode active material layer 156.

[0111] The negative electrode current collector 153 may be made of, for example, a plate-shaped member or a thin member. Alternatively, the negative electrode current collector 153 may include a porous body having a reticulate shape, a mesh shape, or the like.

[0112] The negative electrode current collector 153 may include a first surface 153a and a second surface 153b. The first surface 153a and the second surface 153b oppose each other in the z-direction.

[0113] For example, the negative electrode current collector 153 may include, but not limited to, a porous metal plate made of stainless steel, nickel (Ni), copper (Cu), tin (Sn), aluminum (Al), or an alloy thereof.

[0114] In addition, the negative electrode current collector 153 may be coated with an oxidation-resistant metal or an oxidation-resistant alloy film to prevent oxidation.

[0115] The negative electrode current collector 153, like the positive electrode current collector 133, may include a conductive carbon-based material and one or more types of solid electrolytes. The negative electrode current collector 153 may be identical to the negative electrode active material layers 155 and 156.

[0116] The first negative electrode active material layer 155 and the second negative electrode active material layer 156 may include a negative electrode active material and may be disposed on a surface of the negative electrode current collector 153. The first negative electrode active material layer 155 and the second negative electrode active material layer 156 may be formed by printing a negative electrode active material on one or both surfaces of the negative electrode current collector 153, but the method of forming the negative electrode active material layer is not limited thereto.

[0117] The negative electrode active material included in the negative electrode active material layers 155 and 156 may store the lithium ions that have moved from the positive electrode and release the lithium ions when the all-solid-state battery is discharged, thereby generating electrical energy. A carbon-based material, silicon, a silicon oxide, a silicon-based alloy, a silicon-carbon-based material composite, tin, a tin-based alloy, a tin-carbon composite, a metal oxide, or a combination thereof may be used as the negative electrode active material. The negative electrode active material may contain a lithium metal and / or a lithium metal alloy.

[0118] The lithium metal alloy may contain lithium, and a metal / metalloid capable of making an alloy with lithium. For example, the metal / metalloid capable of forming an alloy with lithium may include Si, Sn, Al, Ge, Pb, Bi, Sb, and Si-AM alloy (wherein AM is an alkali metal, an alkaline earth metal, an element in group 13 to 16, a transition metal, a rare-earth element, or a combination thereof, and does not include Si), Sn-AM alloys (wherein AM is an alkali metal, an alkaline earth metal, an element in group 13 to 16, a transition metal, a transition metal oxide such as lithium titanium oxide (Li4Ti5O12), a rare-earth element, or combinations thereof, and does not include Sn), MnOx(wherein 0<x≤2), and the like.

[0119] The element AM may include Mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Pb, Ru, Os, Hs, Rh, Ir, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, Sn, In, Tl, Ge, P, As, Sb, Bi, S, Se, Te, Po, or combinations thereof.

[0120] Additionally, the oxide of the metal / metalloid capable of forming an alloy with lithium may include lithium titanium oxide, vanadium oxide, lithium vanadium oxide, SnO2, SiOx(wherein 0<x<2), or the like. For example, the negative electrode active material may include one or more elements selected from the group consisting of the elements in group 13 to 16 of the periodic table of elements. For example, the negative electrode active material may contain one or more elements selected from the group consisting of Si, Ge, and Sn.

[0121] The carbon-based material may include crystalline carbon, amorphous carbon, or a mixture thereof. The crystalline carbon may be graphite such as natural graphite or artificial graphite that is in a shapeless, disc-shaped, flake-shaped, globular, or fibrous form. In addition, the amorphous carbon may include, but not limited to, soft carbon (low-temperature calcined carbon), hard carbon, mesophase pitch carbide, calcined cokes, graphene, carbon black, fullerene soot, carbon nanotube, carbon fiber, etc.

[0122] The silicon may include at least one selected from the group consisting of Si, SiOx(wherein 0<x<2, for example, 0.5 to 1.5), Sn, SnO2, or silicon-containing metal alloy, and mixtures thereof. For example, the silicon-containing metal alloy may include silicon, and one or more of Al, Sn, Ag, Fe, Bi, Mg, Zn, In, Ge, Pb, or Ti.

[0123] The negative electrode active material may optionally include a conductive material and a binder.

[0124] The conductive material is not particularly limited as long as it provides conductivity without causing chemical changes in the all-solid-state battery 1000. For example, graphite such as natural graphite and artificial graphite; carbon-based materials such as carbon black, acetylene black, Ketjenblack®, channel black, furnace black, lamp black, and thermal black; conductive fibers such as carbon fibers, metal fibers, etc.; carbon fluoride; metal components such as lithium (Li), tin (Sn), aluminum (Al), nickel (Ni), copper (Cu), etc., oxides thereof, nitrides thereof, or fluorides thereof; conductive whiskers such as zinc oxide and potassium titanate; conductive metal oxides such as titanium oxide; conductive materials such as polyphenylene derivatives, etc., may be used.

[0125] The binder may be used to improve the bonding strength of the active material, the conductive material, or the like. The binder may include, but not limited to, at least one selected from the group consisting of polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, polytetrafluoroethylene, polyethylene, polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butadiene rubber (SBR), fluorine rubber, various copolymers, etc.

[0126] Meanwhile, the negative electrode layer 150 may further contain a solid electrolyte component. The solid electrolyte component may contain one or more of the above-described components and may serve as an ionic conduction channel in the negative electrode layer. Thus, interface resistance can be reduced.

[0127] FIG. 12 is a cross-sectional view schematically showing the negative electrode layer of the all-solid-state battery of FIG. 1.

[0128] Referring to FIG. 12, the negative electrode layer 150 has a shape corresponding to the shape of the laminate 100. That is, the negative electrode layer 150 has a partial doughnut shape or a partial ring shape.

[0129] The edges of the negative electrode layer 150, except for a portion where the negative electrode layer 150 is connected to the second external electrode 300, is spaced apart from the edges of the laminate 100, and the margin portion 180 is disposed in the space therebetween.

[0130] Referring to FIGS. 5 to 8, the upper protective layer 160 and the lower protective layer 170 may be outermost layers disposed on the first surface S1 and the second surface S2 of the laminate 100, respectively. That is, the upper protective layer 160 may be the outermost layer disposed on the first surface S1 of the laminate 100, and the lower protective layer 170 may be the outermost layer disposed on the second surface S2 of the laminate 100. The upper protective layer 160 and lower protective layer 170 may improve moisture resistance by preventing moisture penetration, and may prevent damage from physical and chemical impacts.

[0131] The upper protective layer 160 and the lower protective layer 170 may be an insulating layer made of an insulating material, that is, a material that is not electrically (ionically) conductive.

[0132] The upper protective layer 160 and the lower protective layer 170 may include a ceramic material, for example, alumina (Al2O3), aluminum nitride (AlN), beryllium oxide (BeO), boron nitride (BN), silicon (Si), silicon carbide (SiC), silica (SiO2), silicon nitride (Si3N4), gallium arsenide (GaAs), gallium nitride (GaN), barium titanate (BaTiO3), zirconium dioxide (ZrO2), mixtures thereof, oxides thereof and / or nitrides thereof, or any other suitable ceramic material, but are not limited thereto. In addition, the upper protective layer 160 and the lower protective layer 170 may optionally include the above-described solid electrolyte, and may include one or more types of solid electrolytes, but are not limited thereto.

[0133] The margin portion 180 may be disposed along the edges of the positive electrode layer 130 and the negative electrode layer 150. The margin portion 180 may be disposed to be in contact with the remaining edges of the positive electrode layer 130, except where the positive electrode layer 130 is connected to the first external electrode 200.In addition, the margin portion 180 may be disposed to be in contact with the remaining edges of the negative electrode layer 150, except where the negative electrode layer 150 is connected to the second external electrode 300.

[0134] For example, the margin portion 180 may be disposed on the solid electrolyte layer 110 in a region other than the region where the positive electrode layer 130 or negative electrode layer 150 is disposed. When the positive electrode layer 130 is disposed on the solid electrolyte layer 110, the margin portion 180 may be arranged in a region other than the region where the positive electrode layer 130 is disposed. Likewise, when the negative electrode layer 150 is disposed on the solid electrolyte layer 110, the margin portion 180 may be disposed in a region other than the region where the negative electrode layer 150 is disposed.

[0135] Referring to FIGS. 7 and 8, the margin portion 180 may comprise a portion of the fifth surface S5 and a portion of the sixth surface S6 of the laminate 100. In addition, referring to FIGS. 11 and 12, the margin portion 180 may comprise a portion of the third surface S3 and a portion of the fourth surface S4 of the laminate 100.

[0136] The margin portion 180 may be disposed to compensate for a level difference between the solid electrolyte layer 110 and the positive electrode layer 130 and a level difference between the solid electrolyte layer 110 and the negative electrode layer 150. For example, the margin portion 180 may be disposed on the same plane as the positive electrode layer 130 and the negative electrode layer 150. The margin portion 180 may compensate for a level difference between the solid electrolyte layer 110 and the positive electrode layer 130 or a level difference between the solid electrolyte layer 110 and the negative electrode layer 150. This increases the density between the solid electrolyte layer 110 and the electrode layers, which may prevent interlayer delamination or warping caused by sintering during a process of manufacturing the all-solid-state battery.

[0137] Meanwhile, the margin portion 180 may include a material that is resistant to moisture and has low lithium (Li) ion conductivity. In this case, the margin portion 180 may protect the active material layers 135, 136, 155, and 156 from moisture infiltration or lithium (Li) ion leakage. For example, the margin portion 180 may include an insulating material or an electrolyte material, and may include a material with an ionic conductivity of 1.0x10-10S / cm or less.

[0138] The margin portion 180 may include an insulating material, that is, a material that is not electrically (ionically) conductive.

[0139] The margin portion 180 may include, but not limited to, at least one selected from the group consisting of ceramic materials, such as alumina (Al2O3), aluminum nitride (AlN), beryllium oxide (BeO), boron nitride (BN), silicon (Si), silicon carbide (SiC), silica (SiO2), silicon nitride (Si3N4), gallium arsenide (GaAs), gallium nitride (GaN), barium titanate (BaTiO3), zirconium dioxide (ZrO2), mixtures thereof, oxides thereof and / or nitrides thereof, or any other suitable ceramic material, but is not limited thereto.

[0140] Meanwhile, the margin portion 180 may optionally include a solid electrolyte that is the same as or different from the solid electrolyte included in the above-described solid electrolyte layer, and may include one or more types of solid electrolytes, but is not limited thereto.

[0141] In addition, a material having a low ionic conductivity and electrical conductivity, such as an insulating material, may be present in the margin portion 180, or a material having an ionic conductivity (or electrical conductivity) similar to the ionic conductivity (or electrical conductivity) of a solid electrolyte may be present in the margin portion 180. For example, when a material having ionic conductivity (or electrical conductivity) similar to the ionic conductivity (or electrical conductivity) of the solid electrolyte is present in the margin portion, the material may be a material that is identical to or different from the solid electrolyte in other regions. In another example, a material having ionic conductivity (or electrical conductivity) similar to the ionic conductivity (or electrical conductivity) of the solid electrolyte and an insulating material may coexist in the margin portion.

[0142] Referring to FIGS. 1 and 2, the first external electrode 200 and the second external electrode 300 are disposed outside the laminate 100.

[0143] Referring to FIG. 7, the first external electrode 200 is connected to the positive electrode layer 130 and the solid electrolyte layer 110 on the fifth surface S5 of the laminate 100. For example, the first external electrode 200 may cover the fifth surface S5 of the laminate 100, and the first external electrode 200 may extend onto the first surface S1, the second surface S2, the third surface S3, and the fourth surface S4 of the laminate 100, to partially cover the respective surfaces.

[0144] The first external electrode 200 may be formed by baking a conductive paste. For example, the conductive paste may include glass and a metal such as silver (Ag) or copper (Cu).

[0145] Referring to FIG. 8, the second external electrode 300 is connected to the negative electrode layer 150 and the solid electrolyte layer 110 on the sixth surface S6 of the laminate 100. For example, the second external electrode 300 may cover the sixth surface S6 of the laminate 100, and the second external electrode 300 may extend onto the first surface S1, the second surface S2, the third surface S3, and the fourth surface S4 of the laminate 100 to partially cover the respective surfaces.

[0146] The second external electrode 300 may be formed by baking a conductive paste. For example, the conductive paste may include glass and a metal such as silver (Ag) or copper (Cu).

[0147] For example, the fifth surface S5 and the sixth surface S6 of the laminate 100 may be dipped in a conductive paste and blotted to form the first external electrode 200 and the second external electrode 300. As another example, a conductive paste may be applied to the fifth surface S5 and the sixth surface S6 of the laminate 100, respectively, to form the first external electrode 200 and the second external electrode 300. As still another example, a dry film obtained by drying the conductive paste may be transferred to the laminate 100 and then baked to form the first external electrode 200 and the second external electrode 300, but the method of forming the first external electrode 200 and the second external electrode 300 is not limited to the above-described method. For example, the metal included in the conductive paste may include at least one of copper (Cu), nickel (Ni), tin (Sn), palladium (Pd), platinum (Pt), gold (Au), silver (Ag), tungsten (W), titanium (Ti), lead (Pb) and an alloy thereof, but is not limited thereto.

[0148] FIG. 13 is a perspective view schematically showing an all-solid-state battery according to another embodiment, FIG. 14 is a perspective view schematically showing the laminate of FIG. 13, and FIG. 15 is a cross-sectional view schematically showing the all-solid-state battery of FIG. 13.

[0149] Referring to FIG. 13, an all-solid-state battery 2000 includes a laminate 1100, a first external electrode 1200, and a second external electrode 1300.

[0150] Referring to FIGS. 14 and 15, the laminate 1100 may have a partial doughnut shape or a partial ring shape and may include a solid electrolyte layer 1110, a positive electrode layer 1130, a negative electrode layer 1150, and a margin portion 1180.

[0151] The laminate 1100 is a structure made by stacking the solid electrolyte layer 1110, the positive electrode layer 1130, and the negative electrode layer 1150 in the radial direction, and may have a shape curved about the z-direction. That is, the laminate 100 has a curvature by being curved in a direction intersecting the z-direction.

[0152] The remaining components, except for the above, are identical or corresponding to the components of the all-solid-state battery shown in FIG. 1, so a repeated description thereof will be omitted.

[0153] FIG. 16 is a perspective view schematically showing an all-solid-state battery according to still another embodiment, and FIG. 17 is a plan view showing the all-solid-state battery of FIG. 16. In addition, FIG. 18 is a perspective view schematically showing the laminate of FIG. 16, and FIG. 19 is a plan view of FIG. 16.

[0154] Referring to FIG. 16, an all-solid-state battery 3000 includes a laminate 2100, a first external electrode 2200, and a second external electrode 2300.

[0155] Referring to FIGS. 17 to 19, the laminate 2100 may have a partial doughnut shape or a partial ring shape and may include a solid electrolyte layer 2110, a positive electrode layer 2130, and a negative electrode layer 2150.

[0156] The laminate 2100 is a structure made by stacking the solid electrolyte layer 2110, the positive electrode layer 2130, and the negative electrode layer 2150 in the z-direction, and has a shape curved about the z-direction. That is, the laminate 100 has a curvature by being curved in a direction intersecting the z-direction.

[0157] In other embodiments, the solid electrolyte layer 2110, the positive electrode layer 2130, and the negative electrode layer 2150 may be stacked in the radial direction.

[0158] The laminate 2100 includes a first surface S1, a second surface S2, a third surface S3, a fourth surface S4, a fifth surface S5, and a sixth surface S6. The fifth surface S5 and the sixth surface S6 are both end surfaces of the laminate 2100 in the circumferential direction. That is, the fifth surface S5 and the sixth surface S6 are disposed opposite each other in the circumferential direction.

[0159] Referring to FIG. 19, the fifth surface S5 and the sixth surface S6 may be disposed on substantially the same straight line D-D'. For example, during the manufacturing process of the laminate 2100, the fifth surface S5 and the sixth surface S6 may be formed simultaneously in a single cutting process.

[0160] Here, the expression "substantially the same" may mean that two compared regions are the same (as can be recognized by a person skilled in the art) while allowing for approximations, inaccuracies, and limitations in measurement under the relevant circumstances. In one or more aspects, the term "substantially" may provide industry-accepted tolerances for the corresponding term and / or relativity between items, for example, a tolerance of ±1%, ±5%, or ±10% of the stated actual value, and other appropriate tolerances.

[0161] The remaining components, except for the above, are identical or corresponding to the components of the all-solid-state battery shown in FIG. 1, so a repeated description thereof will be omitted.

[0162] FIG. 20 is a perspective view schematically showing an all-solid-state battery according to yet another embodiment, FIG. 21 is a plan view of FIG. 20, and FIG. 22 is a plan view schematically showing the laminate of FIG. 20.

[0163] Referring to FIGS. 20 to 22, an all-solid-state battery 4000 includes a laminate 3100, a first external electrode 3200, and a second external electrode 3300.

[0164] The fifth surface S5 and the sixth surface S6 of the laminate 3100 are both end surfaces in the circumferential direction. That is, the fifth surface S5 and the sixth surface S6 are disposed opposite each other in the circumferential direction.

[0165] When viewed in the z-direction, an extension E-E' of the fifth surface S5 and an extension F-F' of the sixth surface S6 may be substantially orthogonal.

[0166] Here, the expression "substantially orthogonal" may mean that two intersecting lines are orthogonal (as can be recognized by a person skilled in the art) while allowing for approximations, inaccuracies, and limitations in measurement under the relevant circumstances. In one or more aspects, the term "substantially" may provide industry-accepted tolerances for the corresponding term and / or relativity between items, for example, a tolerance of ±1%, ±5%, or ±10% of the stated actual value, and other appropriate tolerances.

[0167] The remaining components, except for the above, are identical or corresponding to the components of the all-solid-state battery shown in FIG. 1, so a repeated description thereof will be omitted.

[0168] FIG. 23 is a perspective view schematically showing a ring-shaped wearable electronic device mounted with an all-solid-state battery according to an embodiment.

[0169] Referring to FIG. 23, the all-solid-state battery 1000 is mounted inside a ring-shaped wearable electronic device 5000. As with other components 5100, the shape of the all-solid-state battery 1000 corresponds to the shape of the ring-shaped wearable electronic device 5000, so the all-solid-state battery 1000 can be mounted in the ring-shaped wearable electronic device 5000 without wasting space.

[0170] While this disclosure has been described in connection with what is presently considered to be practical embodiments, it is to be understood that the disclosure is not limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1.An all-solid-state battery comprising:a laminate that includes a positive electrode layer, a solid electrolyte layer, and a negative electrode layer;a first external electrode disposed outside the laminate and connected to the positive electrode layer; anda second external electrode disposed outside the laminate and connected to the negative electrode layer,wherein the laminate includesa first curved surface having a circular or elliptical arc shape,a second curved surface having a circular or elliptical arc shape and facing the first curved surface in a first direction, andan end surface disposed in a second direction extending to intersect the first direction between the first curved surface and the second curved surface,an outer angle formed by the end surface with the second direction is acute,an outer angle formed by the end surface with the first curved surface is acute, andan outer angle formed by the end surface with the second curved surface is obtuse.2.The all-solid-state battery of claim 1, wherein:the laminate has a curvature.3.The all-solid-state battery of claim 2, wherein:the first curved surface has a first radius of curvature, andthe second curved surface has a second radius of curvature.4.The all-solid-state battery of claim 3, wherein:the first radius of curvature is greater than the second radius of curvature.5.The all-solid-state battery of claim 4, wherein:the first surface and the second surface form portions of concentric circles when viewed in a third direction intersecting both the first direction and the second direction.6.The all-solid-state battery of claim 2, wherein:the positive electrode layer, the solid electrolyte layer, and the negative electrode layer each have a curvature corresponding to that of the laminate.7.The all-solid-state battery of claim 1, wherein:the end surface includes a first end surface and a second end surface disposed opposite each other in the second direction,the first external electrode is disposed on the first end surface, andthe second external electrode is disposed on the second end surface.8.The all-solid-state battery of claim 7, wherein:the laminate includes a third surface and a fourth surface disposed opposite each other in a third direction intersecting both the first direction and the second direction,the first external electrode extends from the first end surface and covers a portion of the third surface and a portion of the fourth surface, andthe second external electrode extends from the second end surface and covers a portion of the third surface and a portion of the fourth surface.9.The all-solid-state battery of claim 1, wherein:the positive electrode layer, the solid electrolyte layer, and the negative electrode layer are stacked in the first direction.10.The all-solid-state battery of claim 1, wherein:the positive electrode layer, the solid electrolyte layer, and the negative electrode layer are stacked in a third direction intersecting both the first direction and the second direction.11.An all-solid-state battery comprising:a laminate that includes a positive electrode layer, a solid electrolyte layer, and a negative electrode layer;a first external electrode disposed outside the laminate and connected to the positive electrode layer; anda second external electrode disposed outside the laminate and connected to the negative electrode layer,wherein the laminate includesa first curved surface having a circular or elliptical arc shape,a second curved surface having a circular or elliptical arc shape and facing the first curved surface in a first direction, anda first end surface and a second end surface disposed opposite each other in a second direction extending to intersect the first direction between the first curved surface and the second curved surface, andthe first end surface and the second end surface are disposed on the same straight line when viewed in a third direction intersecting both the first direction and the second direction.12.The all-solid-state battery of claim 11, wherein:the laminate has a curvature.13.The all-solid-state battery of claim 12, wherein:the first curved surface has a first radius of curvature, andthe second curved surface has a second radius of curvature.14.The all-solid-state battery of claim 13, wherein:the first radius of curvature is greater than the second radius of curvature.15.The all-solid-state battery of claim 11, wherein:the first external electrode is disposed on the first end surface, andthe second external electrode is disposed on the second end surface.16.An all-solid-state battery comprising:a laminate that includes a positive electrode layer, a solid electrolyte layer, and a negative electrode layer;a first external electrode disposed outside the laminate and connected to the positive electrode layer; anda second external electrode disposed outside the laminate and connected to the negative electrode layer,wherein the laminates includesa first curved surface having a circular or elliptical arc shape,a second curved surface having a circular or elliptical arc shape and facing the first curved surface in a first direction, anda first end surface and a second end surface disposed opposite each other in a second direction extending to intersect the first direction between the first curved surface and the second curved surface, andan extension of the first end surface is orthogonal to an extension of the second end surface when viewed in a third direction intersecting both the first direction and the second direction.17.The all-solid-state battery of claim 16, wherein:the laminate has a curvature.18.The all-solid-state battery of claim 17, wherein:the first curved surface has a first radius of curvature, andthe second curved surface has a second radius of curvature.19.The all-solid-state battery of claim 18, wherein:the first radius of curvature is greater than the second radius of curvature.20.The all-solid-state battery of claim 16, wherein:the first external electrode is disposed on the first end surface, andthe second external electrode is disposed on the second end surface.

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