NONAQUEOUS ELECTROLYTIC SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolytic secondary battery which allows both the increase in initial charge and discharge efficiencies, and the enhancement of cycle characteristic.SOLUTION: The nonaqueous electrolytic secondary battery comprises: a lithium-containing negative-electrode active material which is obtained by heating a lithium-containing raw material containing lithium (Li) and a silicon-containing raw material containing silicon (Si); and fluoroethylene carbonate serving as an electrolyte. Using the lithium-containing negative-electrode active material as a negative-electrode active material, at least part of the irreversible capacity of SiOcan be cancelled. Use of the fluoroethylene carbonate-containing electrolyte allows the enhancement of the cycle characteristic.