Nec Energy Devices, Ltd.

Showa Denko K.k.

Yuka Chikugo

Yasutaka Kono

Hitoshi Ishikawa

Mitsuru Hanasaki

Kou Ishiguchi

Kazunari Fukase

Jiro Uchida

Ippei Waki

Koh Ishiguchi

A lithium ion secondary battery electrode according to the present invention includes (A) a non-fluorinated polymer; (B) an active material; (C) a thickener; and (D) a conductive auxiliary agent. An elution ratio of (A) the non-fluorinated polymer in an electrolytic solution solvent at 60&#xb0; C. is equal to or less than 1.0 mass %, and a swelling ratio of (A) the non-fluorinated polymer in the electrolytic solution solvent at 60&#xb0; C. is equal to or more than 10 mass % and equal to or less than 50 mass %.

Lithium ion secondary battery electrode, method of manufacturing the same, and lithium ion secondary battery

An object of the present invention is to provide: a binder for a lithium ion secondary battery electrode, which is water-dispersible type and has favorable adhesion between active materials and between the active material and current collectors, along with charge-discharge high-temperature cycle characteristics; a slurry using the binder; an electrode using the slurry; and a lithium ion secondary battery using the electrode. The present invention relates to a binder composition for a lithium ion secondary battery electrode, which is obtained by emulsion polymerization of an ethylenically unsaturated monomer in the presence of a surfactant, the ethylenically unsaturated monomer containing, as essential constituents, 15 to 70 mass % of styrene with respect to the total mass of ethylenically unsaturated monomers, an ethylenically unsaturated carboxylic acid ester, an ethylenically unsaturated carboxylic acid and an internal cross-linking agent.

Binder for lithium ion secondary battery electrode, slurry obtained using the binder for electrode, electrode obtained using the slurry, and lithium ion secondary battery using the electrode

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Sagamihara, Japan

Yuka Chikugo