1. Key Laboratory of Automobile Materials (Ministry of Education) College of Materials Science and Engineering Jilin University Changchun 130012 P. R. China
2. Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) State Key Laboratory of Superhard Materials College of Physics Jilin University Changchun 130012 P. R. China
3. College of Science Shenyang Aerospace University Shenyang 110000 P. R. China