Sulfide-based solid electrolyte and battery

Abstract

The present disclosure relates to a sulfide-based solid electrolyte having a novel composition and a novel crystal structure.

Description

Technical Field

[0001] The present disclosure relates to a sulfide-based solid electrolyte having a novel composition. Background Art

[0002] Today, secondary batteries are widely used in large devices such as automobiles and power storage systems, as well as small devices such as mobile phones, camcorders, and laptop computers.

[0003] As the application areas of secondary batteries continue to expand, the demand for improved battery safety and higher performance is increasing.

[0004] As a type of secondary battery, a lithium secondary battery has advantages such as high energy density and large capacitance per unit area compared to a nickel-manganese battery or a nickel-cadmium battery.

[0005] However, the electrolytes used in conventional lithium secondary batteries are mostly liquid electrolytes, such as organic solvents, and therefore safety issues such as electrolyte leakage and the resulting fire risk are constantly being raised.

[0006] Therefore, in order to improve the safety of lithium secondary batteries, there is increasing interest in all-solid-state batteries that use solid electrolytes instead of liquid electrolytes as electrolytes.

[0007] Since solid electrolytes are non-flammable or flame-retardant, they are safer than liquid electrolytes.

[0008] Solid electrolytes are divided into oxide-based solid electrolytes and sulfide-based solid electrolytes. Compared with oxide-based solid electrolytes, sulfide-based solid electrolytes have the advantages of high lithium ion conductivity and stability over a wide voltage range.

[0009] However, sulfide-based solid electrolytes react with moisture in the air to produce toxic hydrogen sulfide (H 2 Therefore, attempts have been made to address the above issues by replacing the composition of sulfide-based solid electrolytes, but there is a limitation that they cannot deviate from the constraints of the selected crystal structure. Summary of the invention

[0010] On the one hand, we now provide sulfide-based solid electrolytes that can display new crystal structures.

[0011] In another preferred aspect, the sulfide-based solid electrolyte has high lithium ion conductivity. In another preferred aspect, the solid electrolyte also generates a small amount of hydrogen sulfide gas.

[0012] In one aspect, a compound of the following formula I is provided:

[0013] [Formula 1]

[0014] Li2 ABS 4 X 2

[0015] Wherein A is indium (In), aluminum (Al), gallium (Ga), scandium (Sc) or yttrium (Y), B is phosphorus (P) or antimony (Sb), and each X can be the same or different and can include chlorine (Cl), bromine (Br) or iodine (I). In some aspects, each X is the same (for example, wherein X in Formula I above is 2 It is Cl 2 Br 2 or I 2 ).

[0016] In one aspect, a sulfide-based solid electrolyte that may be represented by the following Formula 1 is provided.

[0017] [Formula 1]

[0018] Li 2 ABS 4 X 2

[0019] Wherein A may include indium (In), aluminum (Al), gallium (Ga), scandium (Sc), or yttrium (Y), B may include phosphorus (P) or antimony (Sb), and each X may be the same or different and may include chlorine (Cl), bromine (Br), or iodine (I). In some aspects, each X is the same (e.g., wherein X in Formula I above is 2 It is Cl 2 Br 2 or I 2 ).

[0020] In some aspects, A in Formula I is indium (In). In some aspects, A in Formula I is aluminum (Al). In some aspects, A in Formula I is gallium (Ga). In some aspects, A in Formula I is scandium (Sc). In some aspects, A in Formula I is yttrium (Y).

[0021] In certain aspects, B in Formula I is phosphorus (P). In certain aspects, B in Formula I is antimony (Sb).

[0022] In a preferred aspect, the compound or sulfide-based solid electrolyte may include a selected from Li 2 InPS 4 Cl 2 , Li 2 InPS 4 Br 2 , Li 2 InPS 4 I 2 , and at least one of a combination thereof.

[0023] In certain aspects, the compound or sulfide-based solid electrolyte can have a monoclinic crystal structure.

[0024] In some aspects, compounds or sulfide-based solid electrolytes may belong to P2 1 / n Space group.

[0025] In certain aspects, the compound or sulfide-based solid electrolyte may include a compound selected from PS 4 3- ,AS 4 X 2 7- , and at least one anionic cluster of a combination thereof, wherein X is as defined in Formula I.

[0026] In certain aspects, the compound or sulfide-based solid electrolyte may include a PS 4 3- and AS 4 X 2 7- anion clusters, and the sulfide-based solid electrolyte may have a crystal structure in which the PS 4 3- The first polyhedron and the AS 4 X 2 7- The second polyhedrons are connected by sharing one edge, wherein X is defined as in Formula I.

[0027] In certain aspects, the compound or sulfide-based solid electrolyte may include a plurality of anion clusters, the plurality of anion clusters may be arranged in a plurality of rows, and movement paths of lithium ions may exist in spaces between the plurality of rows.

[0028] According to the present disclosure, a sulfide-based solid electrolyte having different physical properties due to a new crystal structure can be obtained.

[0029] According to the present disclosure, a sulfide-based solid electrolyte having high lithium ion conductivity and a small amount of hydrogen sulfide gas generation can be obtained.

[0030] In a further aspect, an electrode comprising one or more compounds of formula I above or a solid electrolyte is provided.

[0031] In other aspects, an all-solid-state battery comprising an electrode is provided, the electrode comprising one or more compounds of formula I or a solid electrolyte. In certain aspects, the electrode is an anode. In certain other aspects, the electrode is a cathode.

[0032] According to the present disclosure, an all-solid-state battery with improved initial coulombic efficiency may be obtained.

[0033] According to the present disclosure, an all-solid-state battery with improved capacity retention rate may be obtained.

[0034] Also provided are vehicles comprising a compound of Formula I or an electrolyte.

[0035] Also provided are vehicles including the all-solid-state batteries disclosed herein.

[0036] As used herein, the term "all-solid-state battery" includes or refers to a rechargeable battery (including a secondary battery) that includes a solid electrolyte (e.g., a gel or polymer (cured)) that may include ionomers and other electrolyte components for transferring ions between the electrodes of the battery.

[0037] Other aspects of the invention are disclosed below.

[0038] The effects of the present disclosure are not limited to the above-mentioned effects. It should be understood that the effects of the present disclosure include all effects that can be inferred from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 An all-solid-state battery according to the present disclosure is shown.

[0040] Figure 2 The crystal structure of the sulfide-based solid electrolyte according to the present disclosure is shown.

[0041] Figure 3 The pathway along which the sulfide-based solid electrolyte according to the present disclosure conducts lithium ions is shown.

[0042] Figure 4 Shown is Li 6 PS 5 The Cl compound conducts the path for lithium ions. DETAILED DESCRIPTION

[0043] The above-mentioned purpose, other purposes, features and advantages of the present disclosure will be easily understood by referring to the preferred embodiments related to the accompanying drawings below. However, the content of the present disclosure is not limited to the embodiments described herein, and can be implemented in other forms. On the contrary, the embodiments introduced here are provided to make the disclosed content thorough and complete, and the spirit of the present disclosure can be fully conveyed to those skilled in the art.

[0044] When explaining each of the accompanying drawings, similar elements are marked with similar reference numerals. In the reference drawings, in order to make the present disclosure clearer, the size of the structure is enlarged and displayed than the actual size. Terms such as first, second, etc. can be used to describe various components, but the components should not be limited by these terms. These terms are only used to distinguish one component from another component. For example, the first component can be referred to as the second component, and similarly, the second component can also be referred to as the first component without departing from the scope of the rights of the present disclosure. Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0045] In this specification, terms such as "including", "having" and the like are intended to indicate the presence of features, quantities, steps, operations, components, parts or combinations thereof described in the specification, but it should be understood that these terms do not exclude the possibility of the presence or increase of one or more other features, quantities, steps, operations, components, parts or combinations thereof. In addition, when a portion of a layer, film, region, sheet, etc. is referred to as being "on" another portion, this includes not only the case where it is "directly" "on" the other portion, but also the case where another portion exists in between. Conversely, when a portion of a layer, film, region, sheet, etc. is referred to as being "under" another portion, this includes not only the case where it is "directly" "under" the other portion, but also the case where another portion exists in between.

[0046] Unless otherwise stated, all the numbers, values ​​and / or expressions used in this specification to represent the amount of components, reaction conditions, polymer compositions and formulations are approximate values, reflecting the uncertainty of various measurements that occur when obtaining these numerical values, wherein these numbers are essentially different, and it should be understood that they are modified by the term "about" in all cases. In addition, unless otherwise stated, when a numerical range is disclosed in this specification, the range is continuous and includes all values ​​from the minimum value to the maximum value (including the maximum value) of the range. In addition, when such a range refers to an integer, unless otherwise stated, all integers from the minimum value to the maximum value (including the maximum value) are included. Unless otherwise stated or it is obvious from the context, as used herein, the term "about" can be understood as within the normal tolerance range of this field, such as within 2 standard deviations of the mean value. "About" can be understood as within 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.1%, 0.05% or 0.01% of the value. Unless the context clearly dictates otherwise, all numerical values ​​provided herein are modified by the term "about."

[0047] In addition, unless otherwise stated, when a numerical range is disclosed in this specification, the range is continuous and includes all values ​​from the minimum value of the range to its maximum value. In addition, unless otherwise stated, when such a range involves an integer value, all integers from the minimum value to the maximum value are included. For example, the range of "5 to 10" should be understood to include any sub-ranges, such as 6 to 10, 7 to 10, 6 to 9, 7 to 9, etc., as well as individual values ​​5, 6, 7, 8, 9 and 10, and should also be understood to include any value between the valid integers in the range, such as 5.5, 6.5, 7.5, 5.5 to 8.5, 6.5 to 9, etc. In addition, for example, a range of "10% to 30%" should be understood to include sub-ranges such as 10% to 15%, 12% to 18%, 20% to 30%, etc., and all integers including values ​​of 10%, 11%, 12%, 13%, etc. up to 30%, and should also be understood to include any values ​​between the valid integers in the said range, such as 10.5%, 15.5%, 25.5%, etc.

[0048] It should be understood that the term "vehicle" or "vehicle" or other similar terms used herein include conventional motor vehicles, such as passenger cars, including sport utility vehicles (SUVs), buses, trucks, various commercial vehicles, watercraft including various ships and boats, aircraft and the like, and include hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles and other alternative fuel vehicles (e.g., fuels derived from resources other than petroleum). As referred to herein, a hybrid vehicle is a vehicle with two or more power sources, such as a vehicle with both gasoline power and electric power. In certain preferred aspects, the vehicle can be electric power, including a hybrid vehicle, a plug-in hybrid vehicle, or a vehicle with electricity as the main or sole power source.

[0049] Figure 1 An all-solid-state battery according to one embodiment of the present disclosure is shown. The all-solid-state battery may include a cathode 10, an anode 20, and a solid electrolyte layer 30 inserted between the cathode 10 and the anode 20. At least one of the cathode 10, the anode 20, and the solid electrolyte layer 30 may include a sulfide-based solid electrolyte according to the present disclosure.

[0050] The sulfide-based solid electrolyte may include a compound represented by Formula 1 below.

[0051] [Formula 1]

[0052] Li 2 ABS 4 X 2

[0053] Wherein A may include indium (In), aluminum (Al), gallium (Ga), scandium (Sc) or yttrium (Y), B may include phosphorus (P) or antimony (Sb), and each X may include chlorine (Cl), bromine (Br) or iodine (I).

[0054] In certain preferred aspects, the sulfide-based solid electrolyte may include a material selected from Li 2 InPS 4 Cl 2 , Li 2 InPS 4 Br 2 , Li 2 InPS 4 I 2 , and at least one of a combination thereof.

[0055] The compounds of the present invention (i.e., compounds of formula (I)) can be easily prepared. For example, In 2 S 3 、InPS 4 and a lithium halide source, such as LiBr, LiCl or Li, mixed and heat treated, for example at 1000K or higher, in a sealed tube to complete the reaction, thereby providing the desired compound (including crystalline forms). Reagents can be purchased commercially or can be easily prepared. Exemplary syntheses are shown in Examples 1-3 below.

[0056] Polycrystalline samples of the compounds of the present disclosure can be easily prepared, for example, by mixing lithium halides (e.g., LiBr, LiCl, LiI) and InPS 4 Mix in a 2:1 molar ratio and place the mixture under high vacuum, e.g. -3 The reaction vessel is then heated at a sufficient temperature and time, for example 723 K for 72 to 120 hours, to complete the reaction, followed by cooling to obtain the desired crystalline material.

[0057] In certain aspects, the sulfide-based solid electrolyte may have a monoclinic crystal structure and belong to the P2 1 / n On the other hand, for evaluation purposes, in the space group denoted as Cs 2 InPS 4 X 2 (X is chlorine (Cl), bromine (Br) or iodine (I)), cesium (Cs) is replaced by lithium (Li). Since the atomic radius of cesium (Cs) is larger than that of lithium (Li), and both elements are Group 1 elements, cesium (Cs) can be replaced by lithium (Li). Table 1 below shows the compounds belonging to P2 according to the present disclosure. 1 / n The coordinate information of the three-dimensional space of the sulfide-based solid electrolyte of the space group. The coordinate information is expressed in fractional coordinates.

[0058] [Table 1]

[0059]

[0060]

[0061] Figure 2 The crystal structure of the sulfide-based solid electrolyte according to the present disclosure is shown. Figure 3 A path along which lithium ions are conducted by a sulfide-based solid electrolyte according to one embodiment of the present disclosure is shown. Figure 4 Shown is Li 6 PS 5 The Cl compound conducts the path for lithium ions.

[0062] See also Figure 2 In one embodiment, the sulfide-based solid electrolyte may include lithium ions (Li) and anion clusters. Suitable anion clusters may include, for example, a group selected from PS 4 3- ,AS 4 X 2 7- and combinations thereof, wherein X is as defined in Formula I above. Specifically, the anion cluster may include a 4 3- The first polyhedron 100 and the AS 4 X 2 7- The second polyhedron 200 is constituted, wherein X is as defined in the above Formula I. The sulfide-based solid electrolyte may have a crystal structure in which the first polyhedron 100 and the second polyhedron 200 are connected while sharing one edge.

[0063] In addition, see Figure 3 , it can be seen that the described sulfide-based solid electrolyte includes a plurality of anion clusters, the plurality of anion clusters are arranged in a plurality of rows, and the movement path of the lithium ions exists in the space between the plurality of rows. In one embodiment, the lithium ions in the sulfide-based solid electrolyte can actively move to the periphery of the first polyhedron 100 and the second polyhedron 200 without any hindrance. On the other hand, see Figure 4 As shown, it can be seen that it is expressed as Li 6 PS 5 The Cl compound is a crystal structure in which anion clusters are connected by sharing one corner, and the compound conducts lithium ions to the periphery of the anion clusters through a complex path.

[0064] In one embodiment, one feature of the sulfide-based solid electrolyte according to the present disclosure is that the amount of hydrogen sulfide generated is small. 2S residual or cross-linked sulfur such as P 2 S 7 The existence of existing compounds, such as Li 7 PS 6 , Li 6 PS 5 X, etc., will react with moisture in the air or moisture introduced during the process to release hydrogen sulfide (H 2 Since the sulfide-based solid electrolyte according to one embodiment of the present disclosure uses LiX and APS 4 As raw material, no residual Li 2 S also does not have crosslinked sulfur. In addition, the sulfide-based solid electrolyte reacts with element A, such as indium (In), to form In before elemental sulfur (S) reacts with moisture. 2 S 4 or InPS 4 Therefore, the sulfide-based solid electrolyte according to the preferred embodiment of the present disclosure may release less hydrogen sulfide gas than conventional compounds.

[0065] Other aspects will be described in more detail through the following embodiments. The following embodiments are only examples to help understand the present disclosure, and the scope of the present disclosure is not limited thereto.

[0066] Example 1-3: Compound Synthesis

[0067] The reaction raw materials include the following In 2 S 3 (commercially available, such as 99.99%, Aladdin), P 2 S 5 (commercially available, such as 99%, Aladdin), LiCl (commercially available, such as 99.9%, Sigma-Aldrich), LiBr (commercially available, such as 99.9%, Sigma-Aldrich), and LiI (commercially available). InPS 4 You can use In 2 S 3 and P 2 S 5 The stoichiometric reaction was carried out at 773 K in a sealed fused silica tube.

[0068] Polycrystalline samples of the compounds of Examples 1-3 below can be prepared by mixing lithium halides (e.g., LiBr, LiCl, LiI) and InPS 4 Mix in a 2:1 molar ratio and place the mixture under high vacuum (e.g. 10 -3 The reaction vessel can then be heated at a temperature and time sufficient to complete the reaction (e.g., 723 K, 72 to 120 hours), followed by cooling to obtain the desired crystalline material.

[0069] Example 1: Li 2 InPS 4 Cl 2 Synthesis

[0070] Li 2 InPS 4 Cl 2 (including crystals) can be obtained by InPS 4 (548 mg) and LiCl (800 mg) as a flux. The reagent mixture can be mechanically ground (e.g., in a mortar) and then placed in a quartz tube. The tube is evacuated to 10 -3 Pa, and sealed by heating (e.g., flame). The reaction tube can be placed in a furnace and then heat treated, for example, by heating to 1000K or higher for 24 to 72 hours or longer, and then cooled to obtain Li 2 InPS 4 Cl 2 .

[0071] Example 2: Li 2 InPS 4 Br 2 Synthesis

[0072] Li 2 InPS 4 Br 2 (including crystals) can be obtained by InPS 4 (548 mg) and LiBr (800 mg) added as a flux. The reagent mixture can be mechanically ground (e.g., in a mortar) and then placed in a quartz tube. The tube is evacuated to 10 -3 Pa, and sealed by heating (e.g., flame). The reaction tube can be placed in a furnace and then heat treated, for example, by heating to 1000K or higher for 24 to 72 hours or longer, and then cooled to obtain Li 2 InPS 4 Br 2 .

[0073] Example 3: Li 2 InPS 4 I 2 The synthesis of

[0074] Li 2 InPS 4 I 2 It can be prepared as described in Examples 1 and 2 above, substituting LiI for LiCl (Example 1) or LiBr (Example 2).

[0075] Example 4

[0076] Measure the hydrogen sulfide gas generation energy of the sulfide-based solid electrolyte according to the present disclosure and a conventional compound represented as Li 6 PS 5 X. The hydrogen sulfide gas generation energy of the compound according to each composition is obtained by using density functional theory (DFT) in the following manner.

[0077] 1) For the composition of the product formed by the reaction of the sulfide-based solid electrolyte (SE) with moisture (H 2 O), design a pseudo-binary reaction formula.

[0078] C 产物 (SE, H 2 O, x) = x·C(SE) + (1 - x)C(H 2 O) --- (1)

[0079] 2) The reaction energy of the above formula is calculated as follows.

[0080] E 反应 (SE, H 2 O, x) = E eq (C 产物 (SE, H 2 O, x)) - E(C 产物 (SE, H 2 O, x)) --- (2)

[0081] Here, eq represents the phase equilibrium state (Equilibria) of the product obtained from the reaction formula (1).

[0082] 3) In the range of 0 < x < 1, after calculating E of x using the reaction formula (2), determine the reaction at the x with the lowest reaction energy according to the reaction formula of the sulfide-based solid electrolyte (SE) and moisture (H 反应 O). 2 O).

[0083] 4) In order to compare the reaction energies of various sulfide-based solid electrolytes (SE), normalize the reaction formula with respect to hydrogen sulfide (H 2 S).

[0084] 5) The hydrogen sulfide gas generation energy can be obtained by dividing the reaction energy by a conversion coefficient that takes into account the conversion rate of sulfur (S) contained in the sulfide-based solid electrolyte (SE) as a reactant participating in the hydrogen sulfide gas generation.

[0085] Obtain Li 6 PS 5Examples of the hydrogen sulfide gas generation energy of Cl are as follows.

[0086] 1) Use Li 6 PS 5 Cl and H 2 The pseudo-binary reaction equation for O generation is as follows.

[0087] C 产物 (Li 6 PS 5 Cl,H 2 O,x)=x·Li 6 PS 5 Cl+(1-x)H 2 O

[0088] 2) When x is 0.2, the reaction energy is the lowest.

[0089] E 反应 (Li 6 PS 5 Cl,H 2 O,0.2)

[0090] =E eq (0.2Li 3 PO 4 +0.4LiHS+0.6H 2 S+0.2LiCl)-(0.2E(Li 6 PS 5 Cl)+0.8E(H 2 O))

[0091] =-10.60eV / atom

[0092] 3) Normalized to 0.6, which is H 2 The equivalent of S.

[0093] E 反应 = -10.60 / 0.6 = -17.67 eV / atom

[0094] 4) Reflect 0.2Li 6 PS 5 The sulfur (S) contained in Cl generates 0.6H 2 The conversion factor of S is 0.6 (0.6 / 0.2×5).

[0095] E 反应 = -17.67 eV / atom × 0.6 = -10.6 eV / atom

[0096] According to the present disclosure, the sulfide-based solid electrolyte and the 6 PS 5 The hydrogen sulfide gas generation energies of conventional compounds of X are shown in Table 2 below.

[0097] [Table 2]

[0098]

[0099] The lower the hydrogen sulfide gas generation energy, the more hydrogen sulfide gas is generated. Referring to Table 2, the sulfide-based solid electrolyte ratio according to the present disclosure is expressed as Li 6 PS 5 The compound of X has a higher hydrogen sulfide gas generation ability. That is, it can be said that the sulfide-based solid electrolyte according to the present disclosure has a low hydrogen sulfide emission amount.

[0100] Example 5

[0101] When a sulfide-based solid electrolyte contacts a positive electrode active material, a side reaction may occur at the interface between the two. Therefore, the interfacial reaction energy used to understand the stability of the sulfide-based solid electrolyte relative to the positive electrode active material can be calculated by computer simulation as follows.

[0102] x·C a +(1-x)·C b →C equil (Equation 1)

[0103] (C a , C b = the composition of the two materials in contact, C equil = low phase equilibrium energy, 0 <x<1)

[0104] ΔE[C a ,C b ]=min{E pd [x·C a +(1-x)·C b ]-x·E[C a ]-(1-x)·E[C b ]} (Equation 2)

[0105] (E pd = in xC a +(1-x)C b The lowest energy combination of the reaction products in

[0106] The relevant energy calculated by density functional theory (DFT) can be obtained from the material project database. In addition, the function to be minimized is in the material project. To explain the phenomenon in the battery, equation 3 can be derived from equation 2.

[0107] Φ pd [c,μ Li ]=min{E pd [c+μLi ]-n Li [c]μ Li}(Equation 3)

[0108] Φ pd [c,μ Li ] indicates that the composition c is in μ Li At this time, the lithium potential determined by the calculated average positive electrode voltage is used.

[0109] Equation 4 below is the formula for determining the interface stability and is μ Li The large potential at the interface can be changed by allowing the sulfide-based solid electrolyte to equilibrate with the external lithium potential and react with the cathode. ΔΦ determines the thermodynamic stability.

[0110] ΔΦ pd [c 正极 ,c 电极 ,μ Li ]=min{Φ pd [x·c 正极 +(1-x)·c 电极 ,μ Li ]-x·Φ[c 正极 ,μ Li ]-

[0111] (1-x)·Φ[c 正极 ,μ Li ]}(Equation 4)

[0112] Finally, the interfacial reaction energy between the sulfide-based solid electrolyte and the positive electrode active material can be determined using ΔΦ. The results are shown in Tables 3 and 4 below.

[0113] [Table 3]

[0114]

[0115] [Table 4]

[0116]

[0117] Referring to Table 3 and Table 4, it can be seen that the interfacial reaction energy of the sulfide-based solid electrolyte according to the present disclosure for all positive electrode active materials is lower than that of Li 6 PS 4 Cl. It can be confirmed that a more stable all-solid-state battery can be obtained by using the sulfide-based solid electrolyte according to one embodiment of the present disclosure.

[0118] Since the embodiments and specifications have been described in detail above, the scope of rights of the present disclosure is not limited to the above embodiments or specifications, and various modifications and improvements made by those skilled in the art using the basic concepts of the present disclosure defined in the claims are also included in the scope of rights of the present disclosure.

Claims

1. A compound of the following formula 1: Li2ABS4X2[Formula 1] Wherein in formula I: A includes indium In, aluminum Al, gallium Ga, scandium Sc or yttrium Y, B includes phosphorus P or antimony Sb, and each X includes chlorine Cl, bromine Br or iodine I.

2. A solid electrolyte comprising a material represented by the following formula 1: Li2ABS4X2[Formula 1] Wherein A includes indium In, aluminum Al, gallium Ga, scandium Sc or yttrium Y, B includes phosphorus P or antimony Sb, and each X includes chlorine Cl, bromine Br or iodine I.

3. The solid electrolyte according to claim 2, wherein the solid electrolyte comprises at least one selected from the group consisting of Li2InPS4Cl2, Li2InPS4Br2, Li2InPS4I2, and combinations thereof. 4 . The solid electrolyte according to claim 2 , wherein the solid electrolyte has a monoclinic crystal structure.

5. The solid electrolyte according to claim 2, wherein the solid electrolyte belongs to P2 1 / n Space group.

6. The solid electrolyte according to claim 2, wherein the solid electrolyte comprises a compound selected from PS4 3- 、AS4X2 7- , and at least one anion cluster selected from the group consisting of , and combinations thereof.

7. The solid electrolyte according to claim 2, wherein the solid electrolyte comprises PS4 3- and AS4X2 7- anion clusters, and the solid electrolyte includes a crystal structure in which PS4 3- The first polyhedron is composed of AS4X2 7- The second polyhedrons are connected when they share a common edge. 8 . The solid electrolyte according to claim 2 , wherein the solid electrolyte includes a plurality of anion clusters arranged in a plurality of rows, and a movement path of lithium ions exists in a space between the plurality of rows.

9. A composition comprising the compound of claim 1.

10. An electrode comprising the compound of claim 1.

11. A battery comprising the compound of claim 1.

12. A battery comprising the electrode according to claim 10.

13. An all-solid-state battery comprising the electrolyte according to claim 2.

14. A vehicle comprising the battery of claim 12.

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