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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.:

US 8354188 B1

PDFFull Text
Expired
Date of Patent:
Jan. 15, 2013

Filed:

Mar. 10, 2006

Polymer for lithium ion secondary battery and lithium ion secondary battery using same

Applicants:

Yasuo Takano, Nishinamiya, JP;

Naoki Imachi, Kobe, JP;

Seiji Yoshimura, Hirakata, JP;

Shin Fujitani, Kobe, JP;

Satoshi Nishikawa, Otsu, JP;

Shinji Bessyo, Takatsuki, JP;

Inventors:

Yasuo Takano, Nishinamiya, JP;

Naoki Imachi, Kobe, JP;

Seiji Yoshimura, Hirakata, JP;

Shin Fujitani, Kobe, JP;

Satoshi Nishikawa, Otsu, JP;

Shinji Bessyo, Takatsuki, JP;

Assignees:

Sanyo Electric Co., Ltd., Osaka, JP;

Sunstar Giken Kabushiki Kaisha, Takatsuki, JP;

Attorney:

Kubovcik & Kubovcik

Primary Examiner:

Patrick Ryan

Assistant Examiner:

Muhammad Siddiquee

Int. Cl.
CPC ...
H01M 2/16 (2006.01); H01M 2/08 (2006.01);
U.S. Cl.
CPC ...
Abstract

A polymer for bonding the positive electrode and negative electrode of a lithium secondary battery, which includes a positive electrode, a negative electrode and an electrolyte solution, with a separator arranged between the positive electrode and the negative electrode. The polymer contains a cationically polymerizable monomer unit (A), a monomer unit (B) providing affinity to the electrolyte solution, a monomer unit (C) providing poor solubility to the electrolyte solution, and a monomer unit (D) containing an anionic or nonionic hydrophilic group. This polymer can be obtained through radical polymerization such as emulsion polymerization or suspension polymerization, and is characterized by having a dissolution rate into a mixed solvent of ethylene carbonate (EC) and diethyl carbonate (DEC) [EC:DEC=5:5 (weight ratio)] of not more than 10% by weight.

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Takano, Yasuo. (2013). Polymer for lithium ion secondary battery and lithium ion secondary battery using same (U.S. Patent No. 8354188). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8354188

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