1. Shanghai Key Lab of Electrical Insulation and Thermal Aging, School of Chemistry and Chemical Engineering, Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
2. School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China
3. State Key Laboratory of Fluorinated Functional Membrane Materials, Shandong Huaxia Shenzhou New Material Co. Ltd., Zibo 256401, P. R. China