1. State Key Laboratory of Silicon MaterialsKey Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and Department of Materials Science and EngineeringZhejiang University Hangzhou 310027 P. R. China
2. State Key Laboratory of Marine Resource Utilization in South China SeaHainan University Haikou 570228 P. R. China
3. Shanghai Synchrotron Radiation FacilityShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201210 P. R. China
4. Department of Materials ChemistryHuzhou University Huzhou 313000 P. R. China
5. College of Materials and Environmental EngineeringHangzhou Dianzi University Hangzhou 310018 Zhejiang China
6. Department of PhysicsCity University of Hong Kong Kowloon 999077 Hong Kong