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Title:
NONAQUEOUS ELECTROLYTIC SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2002/095859
Kind Code:
A1
Abstract:
A nonaqueous electrolytic secondary battery comprising a group of electrodes and a nonaqueous electrolytic solution, characterized in that: (1) the group of electrodes are placed in a housing made of a sheet which comprises a resin layer and has a thickness of 0.5 mm or below, (2) the nonaqueous solvent of the nonaqueous electrolytic solution comprises &gammad −butyrolactone, ethylene carbonate, at least one vinylene carbonate compound, and at least one vinylethylene carbonate compound, (3) the amounts of the vinylene carbonate compound and vinylethylene carbonate compound and the sum total of both are 0.01 to 5 wt%, 0.01 to 5 wt%, and 0.02 to 6 wt% respectively based on the total weight of the nonaqueous solvent, and (4) the amounts of &gammad −butyrolactone and ethylene carbonate are not smaller than 50 vol% and not smaller than 10 vol% respectively based on the total volume of the nonaqueous solvent.

Inventors:
KOTATO MINORU (JP)
SUZUKI HITOSHI (JP)
YAMAMOTO TAKAHIRO (JP)
YAJIMA AKIRA (JP)
Application Number:
PCT/JP2002/004944
Publication Date:
November 28, 2002
Filing Date:
May 22, 2002
Export Citation:
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Assignee:
MITSUBISHI CHEM CORP (JP)
A & T BATTERY CORP (JP)
KOTATO MINORU (JP)
SUZUKI HITOSHI (JP)
YAMAMOTO TAKAHIRO (JP)
YAJIMA AKIRA (JP)
International Classes:
H01M2/02; H01M10/05; H01M10/052; H01M10/0567; H01M10/0569; H01M6/16; (IPC1-7): H01M10/40; H01M2/02
Foreign References:
JP2002184462A2002-06-28
JP2002158035A2002-05-31
JP2002042865A2002-02-08
JP2002190316A2002-07-05
JP2002015771A2002-01-18
JP2001023684A2001-01-26
JP2000235868A2000-08-29
JP2000040526A2000-02-08
Attorney, Agent or Firm:
Tsukuni, Hajime (Toranomon 1-chome Minato-ku, Tokyo, JP)
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