| abstract |
The present invention provides a novel onium salt having high electrochemical oxidation resistance and high electric (ionic) conductivity, which can be suitably used as a non-aqueous electrolyte in an electrochemical device. The compound represented by the following general formula (I) such as trimethylpropylammonium-trifluorofluoroborate, 1-ethyl-3-methylimidazolium-trifluorofluoroborate, and the like. (CN) a X 4-a B − · Z + (I) (In the formula, X is a halogen atom, a is an integer of 1 to 3, Z + is an organic onium cation, and when a is 2 or less, Xs may be different from each other.) An onium salt represented by the formula: [Selection diagram] None |