Denso Corporation

Nippon Steel & Sumikin Chemical Co., Ltd.

Inter-university Research Institute Corporation National Institutes of Natural Sciences

Kenichiro Kami

Manabu Yamada

Hiroshi Ueshima

Norikazu Hosokawa

Kazuhiko Mizuuchi

Norikazu Adachi

Nobuyuki Nishi

Ryuichirou Shinkai

Yasuyuki Ooba

Tadayoshi Amano

This invention provides a carbon nanostructure including: carbon containing rod-shaped materials and/or carbon containing sheet-shaped materials which are bound three-dimensionally; and graphene multilayer membrane walls which are formed in the rod-shaped materials and/or the sheet-shaped materials; wherein air-sac-like pores, which are defined by the graphene multilayer membrane walls, are formed in the rod-shaped materials and/or the sheet-shaped materials.

Carbon nanostructure, metal-supported carbon nanostructure, lithium-ion secondary battery, method for producing carbon nanostructure, and method for producing metal-supported carbon nanostructure

A lithium secondary cell, in which a water-soluble polymer having a superior resistance to organic solvents is used as a binder, is disclosed. The cell comprises a positive electrode and an electrolytic solution, wherein the positive electrode includes a positive electrode active material having a LiNiO compound expressed as Li Ni M O (M is at least one element selected from a group including Co, Mn, Al, B, Ti, Mg and Fe, 0<x&lE;1.2, 0<y&lE;0.25) with a specific crystallimity and a binder for binding the positive electrode active material. The BET specific surface area of the LiNiO compound is not more than 0.65 m /g. The binder has a water-soluble polymer not swollen with the electrolytic solution. The surface of the positive electrode active material is covered by the water-soluble polymer.

Lithium secondary cell and method of producing lithium nickel metal oxide positive electrode therefor

There are provided coiled electrode batteries with high yields, while short-circuiting in the batteries is prevented. A coiled electrode battery according to the invention has coiled electrodes consisting of positive and negative poles and two separators lying between them. In the coiled electrodes, insulating layers made of insulating resin are formed on both sides of the proximal sections of the protrusions of the positive and negative poles . Thus, even if the non-protruding sections of the positive and negative electrodes become exposed due to winding misalignment of the separators in the lengthwise direction, the presence of the insulating layers prevents short-circuits between the proximal sections of the protrusions of the positive and negative electrodes . As a result, yields are increased as short-circuits are avoided inside the battery.

Laminate-type battery and process for its manufacture

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Takahama, Japan

Kenichiro Kami