1. Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.
2. Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing 314019, P. R. China.
3. China Automotive Battery Research Institute Co. Ltd., Beijing 100088, P. R. China.
4. General Research Institute for Nonferrous Metals, Beijing 100088, P. R. China.