1. Qingdao Industrial Energy Storage Research Institute; Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; Qingdao 266101 P. R. China
2. College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Qingdao 266042 P. R. China
3. Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
4. Institute of Physics; Chinese Academy of Sciences; Beijing 100080 P. R. China