Liquid electrolytes comprising ionic liquids, and their use in electrical storage devices

摘要

A liquid electrolyte for electrical storage devices, comprises an ionic liquid having general formula (1) below and a melting point of up to 50°Cwherein R¹ to R⁴ are each independently an alkyl of 1 to 5 carbons or an alkoxyalkyl of the formula R'-O-(CH₂)_n-, R' being methyl or ethyl and the letter n being an integer from 1 to 4, and any two from among R¹, R², R³ and R⁴ may together form a ring, with the proviso that at least one of groups R¹ to R⁴ is an alkoxyalkyl of the above formula; and Y is a monovalent anion. It may also include a nonaqueous organic solvent and/or an ion conductive salt.