SOLID ELECTROLYTIC SECONDARY BATTERY

Title:

SOLID ELECTROLYTIC SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/1999/056337

Kind Code:

A1

Abstract:

A solid electrolytic secondary battery comprising a positive electrode, a negative electrode and a solid electrolyte interposed between the electrodes, wherein the solid electrolyte contains, as a matrix polymer, a block copolymer of vinylidene fluoride and hexafluoropropylene. The membrane of the block copolymer has a strong mechanical toughness and a high solvent retaining capability and, when used as a matrix polymer of the solid electrolyte, significantly improves an adhesion strength, load characteristics and low-temperature characteristics. A constitutional ratio of hexafluoropropylene in the block copolymer is preferably 3 to 7.5 wt.% with a molecular weight of not smaller than 550,000 and a copolymer having a weight-average molecular weight (Mw) of not smaller than 300,000 and smaller than 550,000 may be jointly used.

Inventors:

HATAZAWA TSUYONOBU (JP)
KONDO TAKAYUKI (JP)
IIJIMA YUKIKO (JP)

Application Number:

PCT/JP1999/002156

Publication Date:

November 04, 1999

Filing Date:

April 22, 1999

Export Citation:

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Assignee:

SONY CORP (JP)
HATAZAWA TSUYONOBU (JP)
KONDO TAKAYUKI (JP)
IIJIMA YUKIKO (JP)

International Classes:

C08G65/323; H01M4/62; C08F214/22; H01M10/05; H01M10/0525; H01M10/0565; H01M10/058; (IPC1-7): H01M10/40; H01M4/02

Foreign References:

JPH06243896A	1994-09-02
JPH08250127A	1996-09-27
JPH09115550A	1997-05-02
JPH09306544A	1997-11-28
JPH11111265A	1999-04-23
JPH0113729A
JPH1167274A	1999-03-09
EP0730316A1	1996-09-04
US5565284A	1996-10-15
EP0633618A1	1995-01-11
EP1011165A1	2000-06-21

Other References: