NONAQUEOUS ORGANIC HIGH-VOLTAGE ELECTROLYTE ADDITIVE, NONAQUEOUS ORGANIC HIGH-VOLTAGE ELECTROLYTE AND LITHIUM ION SECONDARY BATTERY

摘要

A nonaqueous organic high-voltage electrolyte additive that the chemical structure as represented by formula (I), wherein Ra, Rb, Rc and Rd are oxygen or organic group, and the organic group comprises one selected from alkyl, alkylene, alkyne, aryl, halogenated alkyl, halogenated alkylene, halogenated alkyne, and halogenated aryl; wherein i, j, q and t are 0 or 1; x, n, e and h are integers between 1 and 4, f is an integer between 0 and (2e+1), k is an integer between 0 and (2h+1), m is an integer between 0 and (2n+1), and y is an integer between 0 and (2x+1). The nonaqueous organic high-voltage electrolyte additive is oxidized and decomposed in the charging process of a high-voltage lithium ion secondary battery, thus the formation of a protective film on the surface of an anode material is promoted subsequently, so that the cycle performance and discharge capability of the lithium ion secondary battery under the high voltage can be improved.