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.
In formula (1), R1 to R4 are each independently an alkyl group of 1 to 5 carbons or an alkoxyalkyl group of the formula R′—O—(CH2)n—, with the proviso that at least one group from among R1 to R4 is the above alkoxyalkyl group. X is a nitrogen or phosphorus atom, and Y is a monovalent anion.
使用以下通式(1)的四元盐(或
离子液体)作为电
化学存储设备的电解质盐或液态电解质,可以获得具有优异低温性能的电
化学存储设备。
在式(1)中,R1至R4分别独立地表示1到5个碳原子的烷基或具有式R′—O—(
CH2)n—的烷氧基烷基,但须满足R1至R4中至少有一个是上述烷氧基烷基。X表示氮或
磷原子,Y表示一价阴离子。