1. State Key Lab of Superhard Material and College of Physics, Jilin University, Changchun 130012, People's Republic of China
2. Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, China
3. School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China
4. Physics College of Jilin Normal University, Changchun 136000, China