二次電池およびその製造方法、ならびに二次電池用負極および二次電池用正極

Title:

二次電池およびその製造方法、ならびに二次電池用負極および二次電池用正極

Document Type and Number:

Japanese Patent JP5424011

Kind Code:

B2

Abstract:

To provide a secondary battery capable of improving cycle characteristics.

The secondary battery includes a positive electrode 21 and a negative electrode 22 as well as an electrolyte, and electrolytic solution is impregnated in a separator 23 installed between the positive electrode 21 and the negative electrode 22. The negative electrode 22 has a negative electrode film 22C containing a fluororesin on a negative electrode active material layer 22B installed on a negative electrode current collector 22A. The fluororesin has a perfluoro-ether bonding having two repeating units (-O-CF2-CF2- and -O-CF2-) as a matrix, and is a compound having carboxyic acid metal base at both terminals. Since chemical stability of the negative electrode 22 is improved, at the time of charge and discharge, lithium ions tend to be easily stored and released in the negative electrode 22 and decomposition reaction of the electrolytic solution is suppressed.

Inventors:

Hiroyuki Yamaguchi
Kiichi Hirose
Tadahiko Kubota

Application Number:

JP2008208366A

Publication Date:

February 26, 2014

Filing Date:

August 13, 2008

Export Citation:

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Assignee:

ソニー株式会社

International Classes:

H01M4/62; H01M4/13; H01M10/052; H01M10/0567; H01M10/0568; H01M10/0569

Domestic Patent References:

JP10053682A

Foreign References:

WO2008078626A1

Attorney, Agent or Firm:

Yoichiro Fujishima
Yasushi Santanzaki
Masao Hasebe
Takaaki Tanaami

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