Abstract: The present invention is intended to provide a nonaqueous electrolyte secondary battery that is suppressed in generation of a gas and a micro short circuit of a negative electrode, while exhibiting an excellent rate characteristic. The present invention relates to a nonaqueous electrolyte secondary battery having a sealed body 70 that encloses a positive electrode 40, a nonaqueous electrolyte solution 60, a negative electrode 30, and a separator 50 formed of an electrically insulating material. The negative electrode 30 is formed by forming a negative electrode active material layer 21, which contains at least a negative electrode active material 12 and a negative electrode binder 11, on a current collector 22. The negative electrode active material 12 contains a titanium compound as a main component, the titanium compound having a particle diameter of 0.1 ?m or more and 20.0 ?m or less.

Abstract: A method for producing a battery pack includes: charging each of a plurality of batteries to 100% state of charge (SOC); and connecting the charged batteries to form the battery pack. At least some of the batteries in the battery pack are serially connected to each other, and each of the plurality of batteries has a positive electrode including a layered rock salt type compound and a negative electrode including a titanium compound. A method for manufacturing an electricity storage device includes, after the battery pack is produced, discharging the battery pack to 30% SOC or more by using a charging and discharging device.

Abstract: The present invention is intended to provide a nonaqueous electrolyte secondary battery that is suppressed in generation of a gas and a micro short circuit of a negative electrode, while exhibiting an excellent rate characteristic. The present invention relates to a nonaqueous electrolyte secondary battery having a sealed body 70 that encloses a positive electrode 40, a nonaqueous electrolyte solution 60, a negative electrode 30, and a separator 50 formed of an electrically insulating material. The negative electrode 30 is formed by forming a negative electrode active material layer 21, which contains at least a negative electrode active material 12 and a negative electrode binder 11, on a current collector 22. The negative electrode active material 12 contains a titanium compound as a main component, the titanium compound having a particle diameter of 0.1 ?m or more and 20.0 ?m or less.

Abstract: A current collector for a battery includes: a layer (1) formed from an electrically conductive material and at least one of (a) a polymer compound having an alicyclic structure, (b) a saturated hydrocarbon polymer compound having a hydroxyl group, (c) a phenoxy resin and an epoxy resin, and (d) an amine having an amine equivalent of 120 g/eq or less and an epoxy resin; a layer (2) which is formed on at least one surface of the layer (1); and a layer (3) formed from an electrically conductive material. The current collector for a battery has stability to an equilibrium potential environment in a negative electrode, a low electric resistance, a blocking property to solvent in electrolytic solution, and a blocking property to a component in an electrolyte. In addition, the current collector for a battery has a high capacity retention rate, and battery durability is improved.

Abstract: A conductive film includes a layer 1 formed by a conductive material 1 that includes a polymer material 1 containing any of (1) an amine and an epoxy resin (where the epoxy resin and the amine are mixed in a ratio of 1.0 or more in terms of the ratio of the number of active hydrogen atoms in the amine with respect to the number of functional groups in the epoxy resin), (2) a phenoxy resin and an epoxy resin, (3) a saturated hydrocarbon polymer having a hydroxyl group, and (4) a curable resin and an elastomer and conductive particles 1. The conductive film has excellent stability in an equilibrium potential environment in a negative electrode and low electric resistance per unit area in the thickness direction. A multilayer conductive film including the conductive film achieves excellent interlayer adhesion, and using them as a current collector enables the production of a battery satisfying both weight reduction and durability.

Abstract: The present invention is intended to provide a nonaqueous electrolyte secondary battery that is suppressed in generation of a gas and a micro short circuit of a negative electrode, while exhibiting an excellent rate characteristic. The present invention relates to a nonaqueous electrolyte secondary battery having a sealed body 70 that encloses a positive electrode 40, a nonaqueous electrolyte solution 60, a negative electrode 30, and a separator 50 formed of an electrically insulating material. The negative electrode 30 is formed by forming a negative electrode active material layer 21, which contains at least a negative electrode active material 12 and a negative electrode binder 11, on a current collector 22. The negative electrode active material 12 contains a titanium compound as a main component, the titanium compound having a particle diameter of 0.1 ?m or more and 20.0 ?m or less.

Abstract: The present invention relates to a package with a secondary battery accommodated therein. Even when the secondary battery contains a titanium compound as negative-electrode active material, the package is capable of suppressing rate characteristics from decreasing caused by formation of gas in the secondary battery. The package is characterized by a pre-charged secondary battery accommodated in a packaging container; the secondary battery has a sealed case that encapsulates a positive electrode, nonaqueous electrolyte, negative electrode and separator; the positive electrode contains a layered rock-salt compound as positive electrode active material; the negative electrode contains a titanium compound as negative-electrode active material and faces the positive electrode with the separator disposed in between; the separator is electrically insulative and is impregnated with the nonaqueous electrolyte.

Abstract: A multilayer conductive film includes a layer 1 including a conductive material containing a polymer material 1 having an alicyclic structure and conductive particles 1 and a layer 2 including a material having durability against positive electrode potential. The multilayer conductive film has stability in an equilibrium potential environment in a negative electrode and stability in an equilibrium potential environment in a positive electrode, has low electric resistance per unit area in the thickness direction, and has excellent barrier properties for a solvent of an electrolytic solution. A battery including a current collector employing the multilayer conductive film can achieve both weight reduction and durability.

Abstract: A current collector for a battery includes: a layer (1) formed from an electrically conductive material and at least one of (a) a polymer compound having an alicyclic structure, (b) a saturated hydrocarbon polymer compound having a hydroxyl group, (c) a phenoxy resin and an epoxy resin, and (d) an amine having an amine equivalent of 120 g/eq or less and an epoxy resin; a layer (2) which is formed on at least one surface of the layer (1); and a layer (3) formed from an electrically conductive material. The current collector for a battery has stability to an equilibrium potential environment in a negative electrode, a low electric resistance, a blocking property to solvent in electrolytic solution, and a blocking property to a component in an electrolyte. In addition, the current collector for a battery has a high capacity retention rate, and battery durability is improved.

Abstract: A multilayer conductive film includes a layer 1 including a conductive material containing a polymer material 1 having an alicyclic structure and conductive particles 1 and a layer 2 including a material having durability against positive electrode potential. The multilayer conductive film has stability in an equilibrium potential environment in a negative electrode and stability in an equilibrium potential environment in a positive electrode, has low electric resistance per unit area in the thickness direction, and has excellent barrier properties for a solvent of an electrolytic solution. A battery including a current collector employing the multilayer conductive film can achieve both weight reduction and durability.

Abstract: A conductive film includes a layer 1 formed by a conductive material 1 that includes a polymer material 1 containing any of (1) an amine and an epoxy resin (where the epoxy resin and the amine are mixed in a ratio of 1.0 or more in terms of the ratio of the number of active hydrogen atoms in the amine with respect to the number of functional groups in the epoxy resin), (2) a phenoxy resin and an epoxy resin, (3) a saturated hydrocarbon polymer having a hydroxyl group, and (4) a curable resin and an elastomer and conductive particles 1. The conductive film has excellent stability in an equilibrium potential environment in a negative electrode and low electric resistance per unit area in the thickness direction. A multilayer conductive film including the conductive film achieves excellent interlayer adhesion, and using them as a current collector enables the production of a battery satisfying both weight reduction and durability.