Nonaqueous electrolytic solution and nonaqueous-electrolyte battery

摘要

Disclosed is a nonaqueous electrolytic solution which forms a nonaqueous-electrolyte battery having high capacity and excellent storage characteristics at high temperatures, while sufficiently enhancing safety at the time of overcharge, and a nonaqueous-electrolyte battery using the same. The nonaqueous electrolytic solution has an electrolyte and a nonaqueous solvent with (A) a compound of formula (2):;
wherein R7 is an optionally halogenated and/or phenylated alkyl group comprising 1-12 carbon atoms, R8 to R12 are independently a hydrogen atom, a halogen atom, an optionally halogenated ether or alkyl group comprising 1-12 carbon atoms, and at least one of R8 to R12 is an optionally halogenated alkyl group comprising 2-12 carbon atoms; and/or (B) a carboxylic acid ester with a phenyl group substituted by at least one alkyl group (having 4 or more carbon atoms) that is optionally substituted.

主权项

1. A nonaqueous electrolytic solution, comprising:
an electrolyte; and a nonaqueous solvent, wherein the nonaqueous electrolytic solution comprises: (A) a first nonaqueous electrolytic solution which comprises (a1) a compound of formula (2): wherein R7 is an alkyl group comprising 1-12 carbon atoms, optionally substituted with at least one selected from the group consisting of a halogen atom and a phenyl group, R8 to R12 are independently a hydrogen atom, a halogen atom, an ether group comprising 1-12 carbon atoms, optionally substituted with a halogen atom, or an alkyl group comprising 1-12 carbon atoms, optionally substituted with a halogen atom, and at least one of R8 to R12 is a secondary or tertiary alkyl group comprising 3-12 carbon atoms, optionally substituted with a halogen atom.