Department of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China;
Department of Chemical Engineering, Hunan Institute of Technology, Hengyang 421008, China;
Department of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China;
Department of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China;
copper(II) complex; hydrothermal synthesis; electrochemical property;