Xia Yongyao, Professor and Doctoral Supervisor of Fudan University; Adjunct professor of Suzhou University and visiting professor of Zhejiang Normal University; Hangzhou Qianjiang Special Expert. 1987 graduated from the chemistry department of Zhejiang Normal University; 1990 obtained the Master of Science degree in electrochemistry from the Department of Chemistry of Jilin University; 1990- 1993 joined Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; 1997 received a doctor's degree in engineering from Saga University, Japan, majoring in energy and materials science. In the same year, he stayed in the Japanese Ministry of Education as a lecturer and lecturer. 65438-0998 worked as a postdoctoral researcher at the Electrochemical Center of the Department of Chemical Engineering in South Carolina. 1999-200 1, postdoctoral researcher, Osaka Institute of Industrial Technology, Ministry of International Trade and Industry, Japan; 2006 54 38+0-2002 Joined the battery development center of Hitachi Maxell Company. In 2003, he returned to work in the Chemistry Department of Fudan University.