1. College of Physics and Energy, Fujian Normal University, Fuzhou, Fujian 350117, P. R. China
2. Huzhou Key Laboratory of Materials for Energy Conversion and Storage, College of Science, Huzhou University, Zhejiang, Huzhou 313000, P. R. China
3. Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, Fuzhou, Fujian 350117, P. R. China
4. Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy Storage, Fuzhou, Fujian 350117, P. R. China