Battery

Details Battery Battery

2006-06-20

2006-06-20

Maples, John S. (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S094000, C429S429000, C429S331000

Reexamination Certificate

active

07063916

ABSTRACT:
The invention provides a battery, which can improve a capacity and cycle characteristics. The battery comprises an electrode winding body, wherein a cathode and an anode are layered and wound with a separator in between inside a battery can. An electrolytic solution is impregnated in the separator. The electrolytic solution contains propylene carbonate, ethylene carbonate, a low viscosity solvent such as dimethyl carbonate, diethyl carbonate, and ethyl methyl carbonate, a carbonic acid ester of an unsaturated compound such as vinylethylene carbonate and vinylene carbonate, and a lithium salt. A content of the propylene carbonate is from 5 wt % to 20 wt %, and a content of the carbonic acid ester is from 0.3 wt % to 3 wt %.

REFERENCES:
patent: 6869723 (2005-03-01), Yamaguchi
patent: 2003/0170550 (2003-09-01), Ugawa et al.
patent: 2004/0121239 (2004-06-01), Abe et al.
patent: 2004/0146786 (2004-07-01), Sato et al.

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