NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

A nonaqueous electrolyte secondary battery which is provided with a positive electrode comprising a positive electrode mixture layer, a negative electrode and a nonaqueous electrolyte. The positive electrode contains lithium difluorophosphate in the positive electrode mixture layer; and the total amount of lithium difluorophosphate contained in the positive electrode is larger than the total amount of lithium difluorophosphate contained in the nonaqueous electrolyte.