Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (2): 643.doi: 10.7503/cjcu20200641

• Article • Previous Articles     Next Articles

Transition Metal Sulfides Hybridized with Reduced Graphene Oxide for High-Performance Supercapacitors

HUANG Dongxue1, ZHANG Ying1, ZENG Ting1(), ZHANG Yuanyuan1, WAN Qijin1(), YANG Nianjun2()   

  1. 1.School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Wuhan 430073,China
    2.Institute of Materials Engineering,University of Siegen,57076 Siegen,Germany
  • Received:2020-09-01 Online:2021-02-10 Published:2020-12-01
  • Contact: YANG Nianjun E-mail:tingzeng1201@outlook.com;qijinwan@wit.edu.cn;nianjun.yang@uni-siegen.de
  • Supported by:
    National Natural Science Foundation of China(61701352)

Abstract:

To assemble high-energy density asymmetric supercapacitors, the development of electrode mate-rials with large specific capacitances, negligible volume changes and long cycling stability is highly required. The hybrids of multiple transition metal sulfides with carbon nanomaterials are promising electrode materials. In this study, a hybrid consisting of Cu-Mo sulfides grown on microwave exfoliated reduced graphene oxide(CuS-MoS2/MErGO) was thus synthesized by means of a hydrothermal method. The CuS-MoS2/MErGO hybrid exhibits a specific capacitance up to 861.5 F/g at a current density of 2 A/g and long cycling life. An asymme-tric supercapacitor was assembled using the positive electrode of NiS/MErGO and the negative electrode of CuS-MoS2/MErGO. It delivers an energy density of up to 54.2 W·h·kg-1 at a power density of 1.28 kW/kg when a cell voltage of 1.6 V is applied. Therefore, the TMS hybrids are promising electrode materials for high-performance electrochemical energy storage applications such as for the assemble of asymmetric supercapacitors.

Key words: Transition metal sulfide, Reduced graphene oxide, Supercapacitor

CLC Number: 

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