NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
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United States of America Patent
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Aug 13, 2015
app pub date -
Sep 2, 2013
filing date -
Sep 6, 2012
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Abstract
Provided is a nonaqueous electrolyte secondary battery comprising a nonaqueous electrolyte. A lithium phosphate compound and a cyclic sulfone compound are contained in the nonaqueous electrolyte. The lithium phosphate compound is contained in an amount greater than 0% by mass and less than or equal to 4.0% by mass relative to the whole mass of the nonaqueous electrolyte. The cyclic sulfone compound is contained in an amount greater than 0% by mass and less than or equal to 3.0% by mass relative to the whole mass of the nonaqueous electrolyte. The lithium phosphate compound comprises lithium difluoro(bisoxalato) phosphate and lithium tetrafluoro(oxalato) phosphate.
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