| abstract |
(57) [Summary] [PROBLEMS] Without changing the process of a conventional gel electrolyte, Provided are a more reliable and safe polymer solid electrolyte having good electrical conductivity, and a lithium secondary battery and an electric double layer capacitor using the same. SOLUTION: The solid polymer electrolyte of the present invention contains an imidazolium salt and a lithium salt represented by the following general formula (I) in a matrix of a fluorine-based polymer compound. Embedded image In the general formula (I), R 1 , R 2 and R 3 each represent an alkyl group or a hydrogen atom, and A − represents (RSO 2 ) 3 C -, (RSO 2) 2 N -, RSO 3 -, BF 4 -, PF 6 -, A sF 6 - and ClO 4 - represents one of, R represents 1 to 4 carbon atoms Represents 3 to 3 perfluoroalkyl groups, and when a plurality of Rs are present, they may be the same or different from each other. |