Nonaqueous electrolyte secondary battery and nonaqueous electrolytic solution for nonaqueous electrolyte secondary battery
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United States of America Patent
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Jan 6, 2015
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May 9, 2011
filing date -
May 10, 2010
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Abstract
A nonaqueous electrolyte secondary battery includes a positive electrode having a positive-electrode active material, a negative electrode having a negative-electrode active material, and a nonaqueous electrolytic solution having a nonaqueous solvent dissolving a solute. The negative-electrode active material includes powdered silicon and/or a silicon alloy, the nonaqueous electrolytic solution includes additives composed of at least one fluorinated lithium phosphate selected from the group consisting of lithium monofluorophosphate, lithium difluorophosphate, and lithium trifluorophosphate and a diisocyanate compound, and the nonaqueous solvent includes a chain carbonate compound.
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