| abstract |
Electrical storage devices having excellent low-temperature properties can be obtained by using a quaternary salt (or ionic liquid) of general formula (1) below as an electrolyte salt for electrical storage devices or a liquid electrolyte for electrical storage devices. n nIn formula (1), R 1 to R 4 are each independently an alkyl group of 1 to 5 carbons or an alkoxyalkyl group of the formula R′—O—(CH 2 ) n —, with the proviso that at least one group from among R 1 to R 4 is the above alkoxyalkyl group. X is a nitrogen or phosphorus atom, and Y is a monovalent anion. |