1. Chinese Academy of Sciences, Qingdao Industrial Energy Storage Research InstituteQingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences No.189, Songling Road Qingdao 266101 P. R. China
2. Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of Sciences Beijing 100049 P. R. China
3. College of Chemistry and Molecular EngineeringQingdao University of Science and Technology Qingdao 266042 P. R. China