• 文献标题:   Modification of a carbon paper electrode by three-dimensional reduced graphene oxide in a MV/4-HO-TEMPO flow battery
  • 文献类型:   Article
  • 作  者:   LI XY, LI JS, HUANG CD, ZHANG W
  • 作者关键词:   carbon paper electrode, binder, threedimensional reduced graphene oxide, mv/4hotempo, flow battery
  • 出版物名称:   ELECTROCHIMICA ACTA
  • ISSN:   0013-4686 EI 1873-3859
  • 通讯作者地址:   Tianjin Univ
  • 被引频次:   3
  • DOI:   10.1016/j.electacta.2019.01.140
  • 出版年:   2019

▎ 摘  要

In this paper, carbon paper (CP) was modified by three-dimensional reduced graphene oxide (3DrGO/CP) and binders. Based on physical (field-emission scanning electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and Raman spectroscopy) and electrochemical tests (cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charging/discharging curves), the physical and chemical properties of 3GrGO/CP electrode were investigated. The physical characterization and electrochemical performance analysis indicated that the different binders significantly influenced the hydrophilicity and the wet surface area of electrode. Nitrogen doping three-dimensional reduced graphene oxide facilitates the electron transfer on electrode/electrolyte interface for both oxidation and reduction processes of 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl (4-HO-TEMPO), provides more reaction area and reduces concentration polarization. Therefore, the modified carbon paper electrode exhibits better electrochemical activity and reversibility compared with the pristine carbon paper electrode in a methyl viologen (MV)/4-HO-TEMPO redox flow battery (RFB). (C) 2019 Elsevier Ltd. All rights reserved.