| abstract |
Provided is a lithium secondary battery which exhibits excellent charge / discharge cycle characteristics under high temperature, and has excellent high temperature storage characteristics and overcharge characteristics. A lithium secondary battery using a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte, wherein the positive electrode contains a lithium-containing oxide containing Co and / or Mn and the negative electrode comprises a carbon material capable of intercalating and deintercalating lithium ions, (S) containing at least one element selected from the group consisting of LiBF 4 (lithium fluoride), LiN (SO 2 F) 2 , LiN (CF 3) 3 SO 2 ) 2 , LiBOB (lithium bisoxalatoborate), and LiDFOB (lithium difluoroarsalate borate). |