1. College of Aerospace Engineering, and College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
2. Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China
3. Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
4. Science and Technology on Power Sources Laboratory, Tianjin Institute of Power Sources, Tianjin 300384, China