1. College of Electrical Engineering & New Energy and Hubei Provincial Engineering Technology Research Center for Microgrid, China Three Gorges University, Yichang 443002, Hubei, P. R. China
2. College of Materials and Chemical Engineering and Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang 443002, Hubei, P. R. China
3. Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115, United States