Abstract: An electrode includes a current collector and an electrode layer formed on the current collector, the electrode layer containing at least a binder having a swelling degree of 150% or more with respect to an active material and an electrolyte. When the surface side of the electrode layer relative to the center in the thickness direction of the electrode layer is defined as the surface-side portion, and the current collector side is defined as the current-collector-side portion. The electrode layer is configured such that the content concentration of the binder in the surface-side portion is higher than the content concentration of the binder in the current-collector-side portion.

Abstract: An energy storage cell includes a case, an electrode terminal, and a power generation element. The case houses the power generation element. The electrode terminal includes a cathode terminal and an anode terminal. The electrode terminal includes a member contact portion that is in contact with a different member. Either or both of the cathode terminal and the anode terminal have a recess in the member contact portion.

Abstract: An electrode is manufactured by forming an active material layer on a surface of an electrode current collector, forming a groove portion on a surface of the active material layer, and peeling off a part of the active material layer. An electrode current collector includes a metal foil and an adhesive layer. The metal foil includes a first region and a second region. The adhesive layer covers the first region. In the second region, the metal foil is exposed. The active material layer includes a first portion that covers the adhesive layer and a second portion that covers the second region. The groove portion is formed in each of the first portion and the second portion. The second portion is peeled off.

Abstract: An electrode body having a current collector layer and an active material layer laminated on the current collector layer, wherein the active material layer has a first layer on the current collector layer and a second layer on the first layer, the first binder included in the first layer is composed of particles in a surface contact shape, and the second binder included in the second layer is composed of particles in a point contact shape.

Abstract: The method of the present disclosure for producing an electrode active material slurry includes kneading a raw material mixture in a kneading device, wherein the kneading device has a heating portion for heating the lowermost portion of the raw material mixture and a cooling portion for cooling the uppermost portion of the raw material mixture, and during the kneading, the temperature of the heating portion is 5° C. or higher than the temperature of the cooling portion.

Abstract: An electrode includes a base material and an active material layer. The active material layer is disposed on a base material surface. One or more grooves are formed on an active material layer surface. The one or more grooves linearly extend along the surface of the active material layer. In a plan view, each of the one or more grooves includes an inlet region, an intermediate region, and an outlet region. Each of the inlet region and the outlet regions is configured such that a first pressure loss occurring when a fluid flows in a forward direction is smaller than a second pressure loss occurring when the fluid flows in a backward direction.

Abstract: In an electricity storage apparatus, a housing houses an electricity storage module that includes cells. Each of the cells has a shape longer in a width direction than in a height direction and a thickness direction. An end in the width direction is provided with an electrode terminal. The housing includes an upper case and a lower case including a bottom wall, a pair of end walls, and a pair of side walls. Each of the end walls includes a facing face facing the electrode terminal. The electricity storage apparatus has a restraint mechanism that restrains damage of the electrode terminal. The restraint mechanism has at least one of a rib extending from at least one of the facing faces toward the electricity storage module and a shape of at least one of the facing faces extending outward in the width direction from the bottom wall toward an upper side.

Abstract: A power storage cell includes a case and a power generating element. The case houses the power generating element, and the case includes a case body and a lid. The lid is provided with an electrode terminal. The electrode terminal includes a first portion, a second portion, and a third portion. The first portion is located outside the case. The third portion is located inside the case. The second portion connects the first portion and the third portion. The third portion is connected to the power generating element. The second portion has a smaller diameter than the first portion and the third portion.

Abstract: The method of the present disclosure for producing an electrode stack includes the following steps, and does not include a step of winding the laminate in a roll after step (c): coating the electrode mixture slurry on the transfer sheet 20, and drying the coated electrode mixture slurry to form an electrode active material layer (a), a step of providing the current collector 30 (b), and a step of transferring the electrode active material layer to at least one surface of the current collector to obtain a laminate (c). The method of the present disclosure for manufacturing a battery includes manufacturing an electrode stack by the method of the present disclosure.

Abstract: 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.

Abstract: A method for producing a secondary battery electrode includes: drying an electrode paste formed on a surface of a current collector; after drying the electrode paste, baking the electrode paste at a higher temperature than during the drying; and after baking the electrode paste, bending the current collector around a roller surface such that the surface of the current collector on which the electrode paste is formed is disposed at an outer side.

Abstract: In a mixing tank, an upper part of an inner wall in a height direction has a higher surface roughness than a lower part thereof.

Abstract: 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, the first current collector is provided with a first through hole, the conductive adhesive layer is inserted into the first through hole, and/or the second current collector is provided with a second through hole, and the conductive adhesive layer is inserted into the second through hole. In the bipolar battery of the present disclosure, the first electrode active material layer is bonded to the current collector for the bipolar battery by the conductive adhesive layer that has entered the first through hole, and/or the second electrode active material layer is bonded to the current collector for the bipolar battery by the conductive adhesive layer that has entered the second through hole.

Abstract: A power storage module comprises a plurality of cells and a bus bar. Each of the cells includes a prismatic case, an electrode terminal, and a power generation element. An outer surface of the prismatic case includes a wide face having a rectangular shape and a side face. The cells are stacked together. The electrode terminal protrudes from the side face toward an outside of the prismatic case. The electrode terminal includes an upper end portion and a lower end portion. The lower end portion is positioned inside the prismatic case. The upper end portion is positioned outside the prismatic case. The bus bar is connected to the electrode terminal at a position in the long-side direction between the upper end portion of the electrode terminal and the side face of the prismatic case.

Abstract: A power storage cell includes a case and an electrode stack. The case accommodates the electrode stack. The case includes a case body and a cap. The case body has an opening. The opening is closed by the cap. The cap has an electrode terminal provided thereto. The electrode stack is formed of a plurality of electrode sheets stacked together. Each of the plurality of the electrode sheets has a current-collecting tab. The plurality of the current-collecting tabs are stacked together to form a tab bundle. At at least part of the tab bundle, lengths of the plurality of the current-collecting tabs are different from one another. The tab bundle is bonded to the electrode terminal. Inside the case, the tab bundle is accommodated in a curved state.

Abstract: A power storage module includes a plurality of single cells. The plurality of the single cells are stacked in a stacking direction. Each of the plurality of the single cells includes a case. The case has a rectangular-parallelepiped-like shape with six outer surfaces. The six outer surfaces include a terminal surface and an opposite surface. The terminal surface is an outer surface, among the six outer surfaces, to which a positive electrode terminal and a negative electrode terminal are provided. The opposite surface is an outer surface, among the six outer surfaces, that is located opposite to the terminal surface. Each of the terminal surface and the opposite surface is parallel to the stacking direction. The plurality of the single cells are aligned in the stacking direction in such a manner that the terminal surface alternates with the opposite surface.

Abstract: The bipolar current collector includes a first metal foil, an adhesive layer, and a second metal foil. The first metal foil has a first principal surface and a second principal surface. The second principal surface is an opposite surface of the first principal surface. The adhesive layer covers the first principal surface. The adhesive layer has electron conductivity. The second metal foil is bonded to the first principal surface by an adhesive layer. The second metal foil has a planar frame shape. The second metal foil is attached along the periphery of the first principal surface.

Abstract: A manufacturing method of a bipolar electrode includes the following (a) to (f). (a) A first carbon film is formed on the sheet-shaped support material. (b) A conductive resin layer is formed on the first carbon film. (c) A second carbon film is formed on the conductive resin layer. (d) A second electrode layer is formed on the second carbon film. (e) The support is separated from the first carbon coating. (f) A bipolar electrode is manufactured by forming a first electrode layer on the first carbon film.

Abstract: A first electrode foil having a pinhole, a second electrode foil, a method of manufacturing a current collector foil to obtain a current collecting foil for a liquid-based battery by laminating, the first electrode foil and the second electrode foil, one is a positive electrode foil, the other is a negative electrode foil, the application step of applying an adhesive to the first electrode foil, suction from the surface side opposite to the surface to which the adhesive is applied in the first electrode foil, a suctioning step of impregnating the adhesive into the pinhole, a drying step of drying the adhesive, and a heat welding step of thermal welding by bonding the second electrode foil to the surface to which the adhesive is applied in the first electrode foil, the method of manufacturing a current collector foil.

Abstract: A current collector foil for a liquid cell includes: one first electrode foil having a pinhole; a first intervening layer; another first electrode foil having a pinhole; a second intervening layer; and a second electrode foil, the one first electrode foil, the first intervening layer, the other first electrode foil, the second intervening layer, and the second electrode foil being stacked in this order. Either the one first electrode foil and the other first electrode foil or the second electrode foil is a positive electrode foil, and either the one first electrode foil and the other first electrode foil or the second electrode foil, whichever is not the positive electrode foil, is a negative electrode foil.