212results about "Bipolar electrodes" patented technology

An active material of the positive electrode comprises secondary particles (2). Each of the secondary particles (2) comprises primary particles (1). Each of the primary particles (1) comprises an olivine-type phosphate compound. A portion of the surface of the secondary particle (2) has a depression (3). At the depression (3), the surface of the secondary particle (2) is concave. A cross-section of the secondary particle (2) satisfies the relationship "0.41 ≤ Sa / Ca ≤ 0.95". "Sa" represents the area of ​​the cross-section of the secondary particle (2). "Ca" represents the area of ​​the smallest circumcircle of the cross-section of the secondary particle (2).

The invention relates to a positive active material, an electrode and a battery. An object of the present disclosure is to improve magnification characteristics. A positive electrode active material includes a powder. The powder includes a plurality of secondary particles. Each of the plurality of secondary particles includes a plurality of primary particles. Each of the plurality of primary particles contains an olivine-type phosphate compound. Carbon adheres to at least part of the surface of the primary particles. In at least some of the plurality of secondary particles, linearly extending grooves are formed in the surfaces of the secondary particles.

Disclosed is a bipolar electrode including a current collector including a polymer film and conductive layer added to at least a part of each of an outer surface and an inner surface of the polymer film, a positive electrode formed on a first surface of the current collector, and a negative electrode formed on a second surface of the current collector, wherein the current collector including the polymer film is thermally fused so as to be sealed, whereby migration of an electrolyte between unit electrodes is prevented.

The invention discloses a high-performance electrode, a preparation method thereof and a solid-state battery. The high-performance electrode comprises a positive electrode, a current collector and a negative electrode, and the current collector is located between the positive electrode and the negative electrode; the negative electrode comprises a metal lithium composite material layer, and the metal lithium composite material layer comprises a granular metal lithium composite material or a pressure-deformed granular metal lithium composite material. The metal lithium composite material comprises: a lithium-containing core; the middle layer is constructed on the surface of the inner core and comprises a first framework formed by interweaving a first framework material, a second framework formed by a second framework material inserted into the first framework, and a limiting polymer for fixing the relative positions of the first framework and the second framework; and a housing comprising a conductive polymer layer and a lithium fast ion conductor distributed in the conductive polymer layer. The high-performance electrode has excellent cycle performance and high safety characteristics.

A method for manufacturing a battery includes conveying a heated bipolar electrode stack in the form of an elongated sheet by a conveyor roller. In the method of the present disclosure, a first electrode active material layer includes a plurality of island portions extending in a conveying direction, and at least one gap extending in the conveying direction is present between the island portions. A temperature drop of the bipolar electrode stack as the bipolar electrode stack passes over the conveyor roller is 30° C. or more. The conveyor roller includes a recess positioned to overlap with the gap or the opposite side of the bipolar electrode stack from the gap such that at least part of the gap or the opposite side of the bipolar electrode stack from the gap does not contact the conveyor roller.

According to an embodiments of the present disclosure, provided is a bipolar unit cell comprising: a laminate which includes a positive electrode current collector, a positive electrode material layer formed on one surface of the positive electrode current collector, a negative electrode current collector, a negative electrode material layer formed on one surface of the negative electrode current collector, and a separator, and in which the positive electrode material layer and the negative electrode material layer are stacked so as to face each other while interposing a separator between them, and a sealing portion that is attached form the other surface of the positive current collector to the other surface of the negative current collector to integrally form the laminate and seal the inside, wherein a conductive layer is formed on the outside of at least one of the positive electrode current collector and the negative electrode current collector, and a bipolar battery having a structure in which two or more of the bipolar unit cells are stacked.

A static battery with a non-conductive elastomeric or thermoplastic housing. The battery-housing is adapted to receive at least one anode assembly, at least one cathode assembly, and at least one bipolar electrode assembly. At least the bipolar electrode assembly is formed from a conductive plastic resin that is formed as a CPE sheet. A carbon material is affixed to the CPE sheet to form the bipolar electrode. The at least one cathode assembly, the at least one anode assembly and the at least one bipolar electrode assembly are received into the battery box such that a liquid and / or gas seal is formed between electrode assemblies. The battery housing has slots into which the electrode assemblies are received. When the electrode assemblies are received into the housing, cells are formed by the cooperation of the electrode assemblies and the battery housing. The cells are then filled with electrolyte such as zinc bromide and a lid is placed on the battery- box. Once sealed the battery box is a liquid tight container for the battery.

An electrode comprising a current-collecting foil sheet and a positive electrode layer, wherein the positive electrode layer is placed on a surface of the current-collecting foil sheet, the positive electrode layer includes a positive electrode active material, the positive electrode active material includes secondary particles, each of the secondary particles includes primary particles, the secondary particles include pored particles each having a pore, a cross section of the positive electrode layer includes a first region and a second region, the first region and the second region are defined as two equal parts formed by dividing the cross section of the positive electrode layer into half in a thickness direction, the first region is interposed between the current-collecting foil sheet and the second region, and a relationship of 50%≤X is satisfied.

To provide a fluoride ion secondary battery capable of improving initial discharge capacity and capacity retention.SOLUTION: A fluoride ion secondary battery 10 includes: a positive electrode mixture layer 11a; and a positive electrode current collector layer 11b. The positive electrode current collector layer 11b has a modulus of elasticity of 1400 kgf / mm2 or less.SELECTED DRAWING: Figure 1

Provided is a composite substrate for a rechargeable lithium battery that includes a support layer including a polymer film, and a metal layer disposed on the support layer and including at least any one of copper, copper oxide, or a combination thereof, wherein the metal layer includes a first metal layer disposed on a surface of the support layer and including an adhesion enhancer and a first copper, and a second metal layer disposed on the first metal layer and including a second copper, and the adhesion enhancer includes a first moiety chemically bonded to the surface of the support layer and including a hydroxyalkylene group, and a second moiety including an amine group configured to adsorb the first copper.

Reduction of reaction resistance. [Solution] A positive electrode active material comprising secondary particles, wherein the secondary particles comprise a plurality of primary particles and a plurality of titanium bodies, the primary particles comprise a phosphate compound having an olivine-type structure, the titanium bodies comprise titanium oxide having a rutile-type structure, and at least a portion of the plurality of titanium bodies are present on the surface of the primary particles.

The present disclosure relates to a secondary battery, and more particularly, to a structure of a secondary battery module in which multiple cells are stacked. In the secondary battery module, at least two voltage detection terminals are provided for each of the current collector foils. As a result, even when one of the voltage detection terminals is damaged, a state in which detection of the voltage and the inflow and outflow of current for each cell such as discharge inactivation are enabled is maintained, and the balancing processing time can be shortened.

The invention provides a power storage module and a method for detaching the power storage module, wherein the power storage module can be easily detached while suppressing the increase of steps during recycling and the like. A power storage module is provided with bipolar electrodes provided with a positive electrode active material on one surface of a current collector foil and a negative electrode active material on the other surface of the current collector foil, an electrode laminate in which a plurality of bipolar electrodes are laminated, and a resin sealing part provided at the peripheral edge of the current collector foil, and a sealing portion that seals between the bipolar electrodes adjacent to each other in the lamination direction of the electrode laminate, the sealing portion having a recessed portion that forms a gap between the peripheral edge portions of the collector foils adjacent to each other in the lamination direction.

Provided is an electrode composite that may include a current collector including a high-porous region and a low-porous region, and an electrode tab electrically connected to the high-porous region. The high-porous region may be adjacent to the low-porous region in the first direction. The electrode tab may be adjacent to the high-porous region in the first direction. The current collector may have a first length in the first direction. A height of the high-porous region in the first direction may be in a range of about 30% to about 50% of the first length. The low-porous region may be a remaining region other than the high-porous region in the current collector. A porosity of the high-porous region may be greater than a porosity of the low-porous region.

A positive electrode active material includes olivine lithium manganese iron phosphate, wherein the olivine lithium manganese iron phosphate contains a first dopant at a phosphorus site and a second dopant at an oxygen site, the first dopant has a valence of +4 and a coordination number of 4 at the phosphorus site, and the second dopant has a valence of −1 at the oxygen site.

A production device 41 is equipped with: fluid injection nozzles 43 which are pressed against areas surrounding the openings 31A of through-holes 31 in a side surface 23c of a sealed object 3 and inject a fluid F into a plurality of inner spaces S via the through-holes 31; a first restraining member 44, which restrains a first region F1 of the sealed object 3 where the plurality of through-holes 31 have been disposed; and a second restraining member 45, which has been disposed independently of the first restraining member 44 and restrains a second region F2 including the inner spaces S, along the stacking direction.

A positive electrode active material comprises secondary particles, wherein each of the secondary particles includes primary particles, and each of the primary particles includes an olivine-type phosphate compound and lithium zirconate.

A bipolar stack unit cell structure includes: a bicell in which a first anode current collector, a first anode active material layer, a first electrolyte layer, a first cathode active material layer, a cathode current collector, a second cathode active material layer, a second electrolyte layer, a second anode active material layer, and a second anode current collector are sequentially arranged, wherein a plurality of the bicells are stacked, and a compression pad is provided between the first anode current collector and the second anode current collector of adjacent bicells of the plurality of bicells. The bipolar stack unit cell structure absorbs a volume change of an anode and suppresses or reduces a volume change of the entire cell to obtain a stable (or suitable) lifespan, and the capacity and voltage thereof can be freely (or suitably) designed by bipolar connection of the unit cells.

According to an embodiment of the present invention, provided are a bipolar battery and a manufacturing method therefor, the bipolar battery comprising: a bipolar assembly including a laminate including a bipolar electrode and a separator, and a gel electrolyte impregnated in the entire laminate; and a battery case, wherein no interfacial gap is included in an interface between the bipolar electrode and the separator, and voids in the gel electrolyte are less than or equal to 5% of the total volume of the gel electrolyte that can be impregnated.

A power storage device is provided with a plurality of bipolar electrodes. Each of the plurality of bipolar electrodes is provided with: a first current collector foil and a second current collector foil that overlap each other; a conductive adhesive layer that is positioned between the first current collector foil and the second current collector foil and that is bonded to the first current collector foil and the second current collector foil; a first active material layer that is positioned on the surface of the first current collector foil; and a second active material layer that is positioned on the surface of the second current collector foil. The conductive adhesive layer contains an adhesive and a conductive auxiliary agent dispersed in the adhesive, the conductive auxiliary agent is spherical particles having a spherical core and a conductive film covering the core, and the addition ratio of the conductive auxiliary agent in the conductive adhesive layer is 0.1-1.0 vol%. A first value obtained by adding twice the standard deviation of the particle diameter of the conductive assistant to the average particle diameter of the conductive assistant is equal to or greater than the thickness of the conductive adhesive layer.

An energy storage device includes at least one energy storage module and a case. Each of the at least one energy storage module includes a plurality of electrode sheets including a bipolar electrode sheet, and a sealant. The bipolar electrode sheet includes a current collector foil, a cathode active material layer, and an anode active material layer. Each of the end faces of the energy storage module in a first direction includes an electrode-facing region and a non-electrode-facing region. In each of the end faces of the energy storage module in the first direction, at least part of the non-electrode-facing region is bonded to another adjacent energy storage module or the case via an adhesive.

The invention relates to the technical field of lithium batteries, in particular to a bipolar current collector, a preparation method thereof and a lithium metal battery. The bipolar current collector comprises a metal foil, an alpha zirconium phosphate doped polyaniline coating and a graphene coating; the metal foil comprises an anode metal foil layer and a cathode metal foil layer; the positive electrode metal foil layer is stainless steel foil, and the surface of the positive electrode metal foil layer is coated with the graphene coating; the negative electrode metal foil layer is a copper layer, and the surface of the negative electrode metal foil layer is coated with the alpha zirconium phosphate doped polyaniline coating; the preparation method of the bipolar current collector comprises the following steps: performing magnetron sputtering on the surface of stainless steel foil to form a copper layer; metal foil is obtained; coating the surface of the copper layer with an alpha zirconium phosphate doped polyaniline solution, drying and curing to form an alpha zirconium phosphate doped polyaniline coating; then, the surface of the stainless steel foil is coated with graphene slurry, post-treatment is conducted, and a graphene coating is formed; and obtaining the bipolar current collector. And preparing the lithium metal battery by using the bipolar current collector.

Provided is a power storage device capable of preventing or suppressing depression of an electrode non-facing region toward the inside of a power storage module in a first direction even when the pressure in the power storage module is reduced to a pressure lower than atmospheric pressure. A power storage device is provided with at least one power storage module and a case. Each of the at least one power storage module has a plurality of electrode sheets including a bipolar electrode sheet, and a sealing body. The bipolar electrode sheet has a collector foil, a positive electrode active material layer, and a negative electrode active material layer. Each end surface of the power storage module in the first direction has an electrode facing region and an electrode non-facing region. At least a portion of the electrode non-facing region is bonded to another adjacent power storage module or case via a bonding material in each end surface of the power storage module in the first direction.

Improved durability. [Solution] The positive electrode active material comprises primary particles and a coating. The primary particles contain lithium manganese phosphate. The coating covers at least a portion of the surface of the primary particles. In the radial direction of the primary particles, the coating comprises a first region and a second region. Each of the first and second regions contains carbon. In TEM-EDS analysis, the signal intensity of manganese in the second region is higher than the signal intensity of manganese in the first region.

In the current collector for a bipolar battery of the present disclosure, the first current collector and the second current collector are bonded to each other via a conductive adhesive layer, and the first current collector and the second current collector have a weld portion and are welded to each other over a peripheral portion of the current collector for a bipolar battery, whereby the conductive adhesive layer is sealed. The bipolar battery of the present disclosure includes an anode active material layer, a current collector for a bipolar battery of the present disclosure, and a cathode active material layer in this order.

A method for producing a bipolar electrode includes: mixing, under shear, a mixture containing a positive electrode active material or negative electrode active material and a binder resin, and a fibrillizable compound, to respectively prepare a positive electrode powder and a negative electrode powder; rolling the positive electrode powder and the negative electrode powder to respectively form a positive electrode layer and a negative electrode layer; and compressing the positive electrode layer and the negative electrode layer by respectively applying different pressures thereto, to respectively adjust a porosity of the positive electrode layer and a porosity of the negative electrode layer.

To improve the cycle endurance of LMFP. [Solution] The positive electrode active material contains olivine-type manganese iron lithium phosphate. The olivine-type manganese iron lithium phosphate contains a first dopant at the manganese iron site. The first dopant is at least one selected from the group consisting of tungsten and molybdenum. At the manganese iron site, the first site occupancy rate of the first dopant is 1% to 10%.

The invention relates to a bipolar electrode and a method for manufacturing a bipolar electrode. The method for manufacturing a bipolar electrode includes: a step for shear-mixing a mixture containing a positive electrode active material or a negative electrode active material and a binder resin with a fiberizable compound to prepare a positive electrode powder and a negative electrode powder, respectively; a step in which the positive electrode powder and the negative electrode powder are rolled to form a positive electrode layer and a negative electrode layer, respectively; and a step in which the positive electrode layer and the negative electrode layer are compressed by applying different pressures to the positive electrode layer and the negative electrode layer, respectively, and the porosity of the positive electrode layer and the porosity of the negative electrode layer are adjusted, respectively.

This disclosure provides a method for manufacturing a battery that can suppress cracking of the electrode active material layer on the opposite side of the gap between bipolar electrode stacks. [Solution] The present disclosure's method for manufacturing a battery includes conveying a heated long sheet-like bipolar electrode stack 100 on a conveyor roller 20. The present disclosure's method further includes the following: the temperature drop of the bipolar electrode stack when it passes the conveyor roller is 30°C or more; the bipolar electrode stack is pressed with a pressing roller 30 before it passes the conveyor roller; the temperature drop of the bipolar electrode stack when it passes the pressing roller is less than 30°C; the pressing roller has a protrusion 31 at a position that overlaps with the gap 131 of the bipolar electrode stack or the opposite side thereof; and a transverse tensile stress is applied to the gap when the bipolar electrode stack passes the pressing roller.

An electrolytic solution for an electrochemical device, including: a cation (C) that is a monovalent to trivalent metal ion; an anion (A); a solvent (SO) that is a compound having a molecular weight of 1,000 or less; and a polymer (P) that has a weight-average molecular weight of more than 10,000, wherein a content ratio of the solvent (SO) relative to 1 mol of the cation (C) is 0.5 to 4 mol, and a content ratio of the polymer (P) is 0.5% by weight or more. Also provided are a plastic composition, an electrode sheet, an insulating layer, and an electrochemical device including the electrolytic solution, as well as producing methods of these.