NONAQUEOUS ELECTROLYTE FOR LITHIUM ION SECONDARY BATTERY AND LITHIUM ION SECONDARY BATTERY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery high in capacity and good in charge/discharge cycle characteristics.SOLUTION: In a lithium ion secondary battery including a positive electrode, a negative electrode and a nonaqueous electrolyte, the nonaqueous electrolyte contains: an electrolyte; a chain carbonate and a cyclic carbonate, as a nonaqueous solvent; and a specific phosphorous-containing compound.