| abstract |
PROBLEM TO BE SOLVED: To provide an electrolytic solution excellent in stability at high temperature and excellent in electrode permeability. An electrolytic solution comprising a quaternary ammonium salt represented by the following formula (1) as an electrolyte. Formula (1): {(R 1 ) a (R 2 ) b (R 3 ) c (R 4 OCH 2 CH 2 OCH 2 CH 2 ) d N} + · A − (1) [Wherein R 1 , R 2 and R 3 are each an alkyl group having 1 to 4 carbon atoms, or formula (2): R 5 OCH 2 CH 2- (2) (Wherein R 5 represents a methyl group or an ethyl group) R 4 represents a methyl group or an ethyl group, and any two of R 1 , R 2 and R 3 may be bonded to each other at a terminal to form an alkylene chain. Well, a, b and c represent an integer of 0 to 3, d represents an integer of 1 to 4, the sum of a, b and c is 3 or less, and the sum of a, b, c and d is 4 And A − represents N (SO 2 CF 3 ) 2 — , BF 4 —, etc.]. [Selection figure] None |