高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (Album-3): 1-11.doi: 10.7503/cjcu20200641

• 研究论文 •    

基于过渡金属硫化物/还原氧化石墨烯复合物的高性能超级电容器

黄东雪1,章颖1,曾婷1,张媛媛1,万其进1,杨年俊2   

  1. 1.武汉工程大学化学与环境工程学院, 武汉 430074
    2.德国锡根大学材料工程研究所, 锡根 57076
  • 收稿日期:2020-09-01 出版日期:2020-09-23 发布日期:2020-12-01
  • 基金资助:
    国家自然科学基金(61701352)

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:2020-09-23 Published:2020-12-01
  • Contact: ZENG Ting,WAN Qijin,YANG Nianjun E-mail:tingzeng1201@outlook.com;qijinwan@wit.edu.cn;nianjun.yang@uni-siegen.de
  • Supported by:
    This paper is supported by the National Natural Science Foundation of China(61701352)

摘要:

组装高能量密度的非对称超级电容器需要使用比电容大、 体积变化小且循环稳定性好的电极材料. 过渡金属硫化物(TMSs)与纳米碳材料的复合物是此类电极材料之一. 采用水热法合成了由Cu-Mo硫化物在微波剥离的还原氧化石墨烯表面生长的复合材料(CuS-MoS2/MErGO). 此复合材料在电流密度为2 A/g时具有高达861.5 F/g的比电容和良好的循环稳定性. 将1.6 V的电池电压施加在由NiS/MErGO为正极, CuS-MoS2/MErGO为负极组装成的不对称超级电容器上时, 该电容器的功率密度为1.28 kW/kg, 且能量密度保持为54.2 W·h·kg-1. 结果表明, TMS复合材料是一种很有前途的高性能电化学储能材料, 尤其是用于非对称超级电容器的组装.

关键词: 过渡金属硫化物, 还原氧化石墨烯, 超级电容器

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

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