Patent ID: 8927158
Filing Date: 2015-01-06
Classification: H01M,Y02E

Abstract:
1. A nonaqueous electrolyte secondary battery comprising: a positive electrode including a positive-electrode active material; a negative electrode including a negative-electrode active material; and a nonaqueous electrolytic solution comprising a nonaqueous solvent and a solute, wherein the solute is dissolved in the nonaqueous solvent, wherein: the negative-electrode active material comprises powdered silicon and/or a silicon alloy; the nonaqueous electrolytic solution comprises additives having at least one fluorinated lithium phosphate selected from the group consisting of lithium monofluorophosphate, lithium difluorophosphate, and lithium trifluorophosphate and an alkylene diisocyanate compound containing an aliphatic hydrocarbon group having 6 to 12 carbon atoms; and the nonaqueous solvent comprises a chain carbonate compound.