1. Department Beijing Key Laboratory of Energy Conversion and Storage Materials College of Chemistry Beijing Normal University 19-Xinjiekouwai Street Haidian Beijing 100875 P. R. China
2. Qian Xuesen Laboratory of Space Technology China Academy of Space Technology 104-Youyi Road Haidian Beijing 100094 P. R. China
3. Center for High Pressure Science and Technology Advanced Research 10-Xibeiwang East Road Haidian Beijing 100094 P. R. China