NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery improved in thermal stability.SOLUTION: A nonaqueous electrolyte secondary battery according to one aspect of the present invention comprises: a positive electrode; a negative electrode; and a nonaqueous electrolyte. The positive electrode includes a lithium-containing transition metal oxide, a metal fluoride, and a tungsten compound. The nonaqueous electrolyte includes a fluorine-containing lithium salt.