NONAQUEOUS ELECTROLYTE FOR SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY

摘要

This nonaqueous electrolyte for a secondary battery contains a salt of a metal ion from group 1 or group 2 of the periodic table, and a siloxane oligomer containing a partial structure represented by general formula (1) and having a number average molecular weight of 500 - 1500 for the styrene conversion. In general formula (1), R1 represents a hydrocarbon or OR2; -OR2 represents an alkoxy group or a substituent group represented by the general formula (2) -O-Q1-COOR3; and the molar fraction of the group represented by the general formula (2) is 5 - 100 mol% of the total molar amount of R1and -OR2 in all partial structures represented by general formula (1). This constitution provides a nonaqueous electrolyte for a secondary battery that has flame resistance and superior lithium ion conductivity and is suitably used in a lithium secondary battery, and a high output lithium secondary battery containing this nonaqueous electrolyte for a secondary battery is provided.