SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 61 ›› Issue (9): 102-109.DOI: 10.1016/j.cjche.2023.03.013

• Full Length Article • 上一篇    下一篇

Supercapacitive properties of MnNiSx@Ti3C2Tx MXene positive electrode assisted by functionalized ionic liquid

Pengcheng Hu, Ruimin Chai, Ping Wang, Jinke Yang, Shufeng Zhou   

  1. College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
  • 收稿日期:2022-11-22 修回日期:2023-02-21 出版日期:2023-09-28 发布日期:2023-12-14
  • 通讯作者: Pengcheng Hu,E-mail:hupc1987@hqu.edu.cn
  • 基金资助:
    The authors gratefully acknowledge the financial support of the Scientific Research Funds of Huaqiao University (605-50Y17073), Xiamen, China.

Supercapacitive properties of MnNiSx@Ti3C2Tx MXene positive electrode assisted by functionalized ionic liquid

Pengcheng Hu, Ruimin Chai, Ping Wang, Jinke Yang, Shufeng Zhou   

  1. College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
  • Received:2022-11-22 Revised:2023-02-21 Online:2023-09-28 Published:2023-12-14
  • Contact: Pengcheng Hu,E-mail:hupc1987@hqu.edu.cn
  • Supported by:
    The authors gratefully acknowledge the financial support of the Scientific Research Funds of Huaqiao University (605-50Y17073), Xiamen, China.

摘要: MnNiSx@Ti3C2x as the positive electrode of supercapacitor was successfully prepared by hydrothermal method with the assistance of amino-functionalized ionic liquids. The micromorphological structures of MnNiSx@Ti3C2x were analyzed using X-ray diffraction, scanning electron microscope, X-ray photoelectron spectroscopy, transmission electron microscope, and energy dispersive spectrometer to reveal the synergistic effect between MnNiSx and Ti3C2x MXene. MnNiSx grew into a three-dimensional coral-like structure on the surface and between layers of Ti3C2x nanosheets. This structure alleviated the collapse and stacking of Ti3C2x, increased the specific surface area of Ti3C2x, and promoted the charges transfer on the surface of Ti3C2x. The electrochemical performances of MnNiSx@Ti3C2x positive electrode, such as cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy, were investigated. The synergistic effect between MnNiSx and Ti3C2x MXene improved the specific capacitance and the capacitance retention of the MnNiSx@Ti3C2x electrode. An asymmetric solid-state supercapacitor (ASC) assembled using MnNiSx@Ti3C2x as cathode material had the power density of 816.34 W·kg-1, and the energy density of 35.11 Wh·kg-1. The capacitance retention of ASC reached 98% after 5000 cycles at a current density of 5 A·g-1.

关键词: Supercapacitor, Transition metal sulfide, MXene, Structure characterization, Electrochemical performance

Abstract: MnNiSx@Ti3C2x as the positive electrode of supercapacitor was successfully prepared by hydrothermal method with the assistance of amino-functionalized ionic liquids. The micromorphological structures of MnNiSx@Ti3C2x were analyzed using X-ray diffraction, scanning electron microscope, X-ray photoelectron spectroscopy, transmission electron microscope, and energy dispersive spectrometer to reveal the synergistic effect between MnNiSx and Ti3C2x MXene. MnNiSx grew into a three-dimensional coral-like structure on the surface and between layers of Ti3C2x nanosheets. This structure alleviated the collapse and stacking of Ti3C2x, increased the specific surface area of Ti3C2x, and promoted the charges transfer on the surface of Ti3C2x. The electrochemical performances of MnNiSx@Ti3C2x positive electrode, such as cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy, were investigated. The synergistic effect between MnNiSx and Ti3C2x MXene improved the specific capacitance and the capacitance retention of the MnNiSx@Ti3C2x electrode. An asymmetric solid-state supercapacitor (ASC) assembled using MnNiSx@Ti3C2x as cathode material had the power density of 816.34 W·kg-1, and the energy density of 35.11 Wh·kg-1. The capacitance retention of ASC reached 98% after 5000 cycles at a current density of 5 A·g-1.

Key words: Supercapacitor, Transition metal sulfide, MXene, Structure characterization, Electrochemical performance