1. Department of Mechanical and Energy Engineering, Southern University of Science and Technology 1 , Shenzhen 518055, China
2. Department of Mechanical Engineering, National University of Singapore 2 , Singapore
3. Department of Electronic and Electrical Engineering, Southern University of Science and Technology 3 , Shenzhen 518055, China
4. State Key Laboratory of Electrical Insulation and Power Equipment, Center of Nanomaterials for Renewable Energy (CNRE), School of Electrical Engineering, Xi'an Jiaotong University 4 , Xi'an 710049, China
5. Department of Materials Science and Engineering, Southern University of Science and Technology 5 , Shenzhen 518055, China