NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

The nonaqueous electrolyte secondary battery 100 herein proposed is characterized by being manufactured by performing an initial charging and discharging treatment on an assembly, in which are accommodated in a battery case 80 an electrode body 40, and a nonaqueous electrolyte containing a compound expressed by a general formula: A+[PX6-2n(C2O4)n]-, the content of the compound being 1.1 mass% to 1.2 mass% when the total mass of the nonaqueous electrolyte is assumed to be 100 mass%.