1. State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
2. Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA.
3. Shanghai Key Laboratory of Hydrogen Science, School of Materials Science and Engineering, Shanghai Jiao Tong University; Shanghai 200240, P. R. China.
4. Wanxiang A123-Global Headquarters, A123 Systems, Hangzhou 311215, P. R. China.
5. Research and Development Center, A123 Systems, Waltham, MA 02451, USA.