The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 2015
Filed:
Apr. 15, 2011
Mitsuru Hanasaki, Tatsuno, JP;
Kazunari Fukase, Tatsuno, JP;
Jiro Uchida, Tatsuno, JP;
Yasutaka Kono, Sagamihara, JP;
Yuka Chikugo, Sagamihara, JP;
Kou Ishiguchi, Sagamihara, JP;
Mitsuru Hanasaki, Tatsuno, JP;
Kazunari Fukase, Tatsuno, JP;
Jiro Uchida, Tatsuno, JP;
Yasutaka Kono, Sagamihara, JP;
Yuka Chikugo, Sagamihara, JP;
Kou Ishiguchi, Sagamihara, JP;
SHOWA DENKO K. K., Tokyo, JP;
NEC ENERGY DEVICES, LTD., Kanagawa, JP;
Abstract
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.