1. The Jiangsu Province Engineering Laboratory of, High Efficient Energy Storage Technology and Equipment; School of Materials Science and Engineering; China University of Mining and Technology; Xuzhou 221116 P.R. China
2. State Key Laboratory of Coal Conversion; Institute of Coal Chemistry Chinese Academy of Sciences; Taiyuan 030001 P.R. China
3. Xuzhou B&C Information Chemical Co., Ltd.; Xuzhou 221300 P.R. China