1. Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China
2. Department of Applied Chemistry, School of Chemistry, University Engineering Research Center of Energy Storage Materials and Chemistry of Shaanxi Province, State Key Laboratory for Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China