公开(公告)号：EP3944273A1

公开(公告)日：2022-01-26

申请号：EP20774137.2

申请日：2020-03-09

申请人： The University of Tokyo ,  Mitsubishi Materials Electronic Chemicals Co., Ltd. ,  Mitsubishi Materials Corporation

发明人： YAMADA, Atsuo ,  YAMADA, Yuki ,  KO, Seongjae ,  MIURA, Shota ,  KAMIYA, Takeshi ,  HONDA, Tsunetoshi ,  AKIKUSA, Jun

IPC分类号： H01G11/06 ,  H01G11/20 ,  H01G11/62 ,  H01M10/36

摘要： According to the present invention, an electrolyte is composed of one or more lithium salts of asymmetric imides each having a perfluoroalkyl group, or a mixed salt of a lithium salt of an asymmetric imide having a perfluoroalkyl group and a lithium salt of a symmetric imide having a perfluoroalkyl group. The composition ratio of the one or more lithium salts and the mixed salt is expressed by (lithium salt of asymmetric imide) x (lithium salt of symmetric imide) 1-x (wherein x is from 0.1 to 1.0) in terms of the molar ratio; the asymmetric imide lithium salt is (C 2 F 5 SO 2 ) (CF 3 SO 2 )NLi or (C 3 F 7 SO 2 ) (CF 3 SO 2 )NLi; the symmetric imide lithium salt is (CF 3 SO 2 ) 2 NLi; and the composition of an electrolyte solution according to the present invention contains 1.0 mole or more but less than 2 moles of a solvent per 1 mole of the one or more lithium salts or the lithium salts of the mixed salt.