FUNCTIONAL ELECTROLYTE ADDITIVES AND ELECTROCHEMICAL DEVICE COMPRISING THE SAME

摘要

Provided is a functional additive for an electrolyte, which inhibits the reaction heat generated from side reactions between a cathode and an electrolyte, and thus improves the quality of a battery while maintaining the battery quality. The electrolyte comprises: (a) an electrolyte salt; (b) an organic solvent; and (c) at least one compound selected from the group consisting of the compounds represented by the following formulae (I) and (II). In formulae (I) and (II), each of R1, R2 and R3 represents independently H or a C1-C6 lower alkyl; R4 is a single bond or the formula (a); X is -O- or -OC(O)O-; each of n and m is an integer of 0-1000; each of p and q is an integer of 0-20, with the proviso that p and q cannot represent 0 at the same time; r is an integer of 1-6; each o i and j is an integer of 1-1000; and s is an integer of 1-20.