能源化学(英文版)

能源化学(英文) ›› 2019, Vol. 28 ›› Issue (2): 58-64.DOI: 10.1016/j.jechem.2018.01.024

• Preface • 上一篇    下一篇

In-situ growth of nanowire WO2.72 on carbon cloth as a binder-free electrode for flexible asymmetric supercapacitors with high performance

Xiao Huanga, Zhiguo Zhanga, Huan Lia, Hongxia Wangb, Tingli Maa,c   

  1. a Department of Life Science and System Engineering, Kyushu Institute of Technology, Kitakyushu 8080134, Japan;
    b School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology Brisbane QLD4001, Australia;
    c School of Petroleum and Chemical Engineering, Dalian University of Technology, Dalian 124221, Liaoning, China
  • 收稿日期:2017-11-23 修回日期:2018-01-16 出版日期:2019-02-15 发布日期:2019-02-15
  • 通讯作者: Tingli Ma
  • 基金资助:

    This work was supported by the Grant-in-Aid for Scientific Research (KAKENHI) Program, Japan (C, Grant Number 15K05597) and Takahashi Industrial and Research Center for Solar Light Energy Conversion, Kyushu Institute of Technology.

In-situ growth of nanowire WO2.72 on carbon cloth as a binder-free electrode for flexible asymmetric supercapacitors with high performance

Xiao Huanga, Zhiguo Zhanga, Huan Lia, Hongxia Wangb, Tingli Maa,c   

  1. a Department of Life Science and System Engineering, Kyushu Institute of Technology, Kitakyushu 8080134, Japan;
    b School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology Brisbane QLD4001, Australia;
    c School of Petroleum and Chemical Engineering, Dalian University of Technology, Dalian 124221, Liaoning, China
  • Received:2017-11-23 Revised:2018-01-16 Online:2019-02-15 Published:2019-02-15
  • Contact: Tingli Ma
  • Supported by:

    This work was supported by the Grant-in-Aid for Scientific Research (KAKENHI) Program, Japan (C, Grant Number 15K05597) and Takahashi Industrial and Research Center for Solar Light Energy Conversion, Kyushu Institute of Technology.

摘要： For the first time, WO2.72 nanowires were in-situ grown on carbon cloth by a simple solvothermal reaction. The nanowire WO2.72/carbon cloth (NW WO2.72/CC) electrode showed good electrochemical performance with specific capacitance (Cs) reaching up to 398 F g-1 at a current density of 2 A g-1. The capacitance of 240 F g-1 was retained at a high current density of 16 A g-1. To further evaluate the energy storage performance, flexible asymmetric supercapacitors (FASCs) were fabricated using the activated carbon/carbon cloth (AC/CC) as negative electrode and NW WO2.72/CC as positive electrode, respectively. The FASCs delivered a high energy density of 28 Wh kg-1 at a power density of 745 W kg-1 and 13 Wh kg-1 even at a high power density of 22.5 kW kg-1. More impressively, 81% of the specific capacitance of the FASCs was retained after 10,000 cycles, indicating excellent cycle stability. This work indicates the NW WO2.72/CC holds a great potential for application in energy storage devices.

关键词: Solvothermal reaction, Asymmetric supercapacitors, High energy density, Flexibility

Abstract: For the first time, WO2.72 nanowires were in-situ grown on carbon cloth by a simple solvothermal reaction. The nanowire WO2.72/carbon cloth (NW WO2.72/CC) electrode showed good electrochemical performance with specific capacitance (Cs) reaching up to 398 F g-1 at a current density of 2 A g-1. The capacitance of 240 F g-1 was retained at a high current density of 16 A g-1. To further evaluate the energy storage performance, flexible asymmetric supercapacitors (FASCs) were fabricated using the activated carbon/carbon cloth (AC/CC) as negative electrode and NW WO2.72/CC as positive electrode, respectively. The FASCs delivered a high energy density of 28 Wh kg-1 at a power density of 745 W kg-1 and 13 Wh kg-1 even at a high power density of 22.5 kW kg-1. More impressively, 81% of the specific capacitance of the FASCs was retained after 10,000 cycles, indicating excellent cycle stability. This work indicates the NW WO2.72/CC holds a great potential for application in energy storage devices.

Key words: Solvothermal reaction, Asymmetric supercapacitors, High energy density, Flexibility