Battery
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United States of America Patent
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Aug 17, 2010
Grant Date -
Jun 22, 2006
app pub date -
Dec 7, 2005
filing date -
Dec 10, 2004
priority date (Note) -
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Abstract
A battery capable of improving cycle characteristics is provided. A spirally wound electrode body in which a cathode and an anode are wound with a separator in between is included. An electrolytic solution in which an electrolyte salt is dissolved in a solvent is impregnated in the separator. The electrolytic solution contains a cyclic ester carbonate derivative having halogen atom such as 4-fluoro-1,3-dioxolan-2-one and a light metal salt such as difluoro[oxolate-O,O′]lithium borate, tetrafluoro[oxolate-O,O′]lithium phosphate, and difluoro bis[oxolate-O,O′]lithium phosphate.
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