title: Crystalline NiCo2S4 nanotube array coated with amorphous NiCoxSy for supercapacitor electrodes.
abstract: Hierarchical NiCo2S4@NiCoxSy core/shell nanoarrays grown on carbon cloth were successfully synthesized via a two-step hydrothermal route and following an electrodeposition process. Compared with bare NiCo2S4, the electrochemical performance of NiCo2S4@NiCoxSy nanoarrays have been apparently improved, which shows areal capacitance as high as 3.9F/cm(2) at a constant current density of 1mA/cm(2). And the composite material exhibits excellent rate capability that a high areal capacitance of 2.9F/cm(2) is still retaining as the current density increase to 50mA/cm(2). The superior electrochemical performance can be attributed to the reasonably designed core/shell hierarchical structure of NiCo2S4@NiCoxSy nanoarrays, which would be promising for high-performance supercapacitor materials.
authors.affiliation: Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China.
authors.forename: Rui
authors.initials: R
authors.lastname: Ding
authors.affiliation: Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China. Electronic address: zhangmingyi@hrbnu.edu.cn.
authors.forename: Mingyi
authors.initials: M
authors.lastname: Zhang
authors.affiliation: Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China.
authors.forename: Yunhe
authors.initials: Y
authors.lastname: Yao
authors.affiliation: Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China. Electronic address: gaohong65cn@126.com.
authors.forename: Hong
authors.initials: H
authors.lastname: Gao
keywords: Core/shell; Hydrothermal; Nanoarrays; Nanotube; NiCo(2)S(4); Supercapacitor