1. Institute of Energy Innovation, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2. CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
3. College of Physics and Information Engineering, Minnan Normal University, Zhangzhou 361000, China
4. Department of Microsystems, University of South-Eastern Norway, Horten, 3184, Norway