title: Controllable synthesis of various kinds of copper sulfides (CuS, Cu7S4, Cu9S5) for high-performance supercapacitors.
abstract: Three types of copper sulfides including CuS, Cu7S4 and Cu9S5 were successfully synthesized at different concentrations of ethylenediamine in a liquid phase synthesis process. The whole shape evolution of Cu7S4 microstructures could be manipulated by adjusting the concentration of ethylenediamine. This study indicates that the coordination chemistry of ethylenediamine ligands and copper cations exerts vital effects on the formation of the dendritic structure. Furthermore, experimental conditions such as the reaction temperature and time are also observed to have an impact on the morphology of copper sulfides. The structures of Cu7S4 with snowflake-like morphology provided special paths for ion diffusion. Therefore, apart from the excellent discharge rate and good stability, Cu7S4 also exhibits a high specific capacitance of 1303.01 F g(-1) at a current density of 5 A g(-1).
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China. liuxy@jlu.edu.cn.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Fuyang
authors.initials: F
authors.lastname: Liu
authors.forename: Ying
authors.initials: Y
authors.lastname: Ji
authors.forename: Min
authors.initials: M
authors.lastname: Yang
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Qiushi
authors.initials: Q
authors.lastname: Sun
authors.forename: Ziqing
authors.initials: Z
authors.lastname: Zhang
authors.forename: Xudong
authors.initials: X
authors.lastname: Zhao
authors.forename: Xiaoyang
authors.initials: X
authors.lastname: Liu