Patent ID: 9620816
Date: 2017-04-11
CPC Classifications: H01G,H01M,Y02E,Y02T

Claim:
1. A nonaqueous electrolytic solution, comprising: a nonaqueous solvent having dissolved therein an electrolyte salt, wherein the nonaqueous solvent comprises two or more kinds of cyclic carbonates selected from the group consisting of ethylene carbonate, propylene carbonate, 1,2-butylene carbonate, 2,3-butylene carbonate, 4-fluoro-1,3-dioxolan-2-one, trans- or cis-4,5-difluoro-1 3-dioxolan-2-one, vinylene carbonate, vinyl ethylene carbonate and 4-ethynyl-1,3-dioxolan-2-one, the nonaqueous electrolytic solution further comprises a cyclic acid anhydride of formula (I) in an amount of from 0.01 to 10% by mass: wherein R R