1. State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province Department of Materials Science and EngineeringZhejiang University Hangzhou 310027 P. R. China
2. Department of Materials ChemistryHuzhou University Huzhou 313000 China
3. College of Materials and Environmental EngineeringHangzhou Dianzi University Hangzhou 310018 Zhejiang China
4. Department of PhysicsCity University of Hong Kong Kowloon 999077 Hong Kong
5. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) College of ChemistryNankai University Tianjin 300071 China