ELECTROLYTE, AND ELECTROLYTE SOLUTION OR ELECTROCHEMICAL ELEMENT COMPRISING THE SAME

摘要

Disclosed is an electrolyte having excellent long term reliability, a high withstanding voltage (a wide potential window), and high conductivity. Specifically disclosed is an electrolyte comprising a quaternary ammonium salt represented by the general formula (1) [wherein R¹ represents a hydrocarbon group; R² represents a hydrocarbon group, a hydrogen atom or a halogen atom; R³ to R¹⁴ independently represent an alkyl group, a fluoroalkyl group, a hydrogen atom or a halogen atom; C and C* independently represent a carbon atom; N represents a nitrogen atom; h, i, j, x, y and z independently represent an integer of 0 to 6, provided that (h+x) is 0 to 6, and each of (i+y) and (j+z) is 1 to 6; and X^- represents a counter anion which has a HOMO energy of -0.60 to -0.20 a.u. as determined by the first-principle calculation on molecular orbital of the counter anion]. (1)