CARBON PAPER IN-SITU MODIFIED BY CARBON NANOFIBER AS ELECTRODE OF ALL-VANADIUM REDOX FLOW BATTERY
Carbon paper in-situ modified by carbon nanofiber (CPMCN) has been prepared by chemical vapor deposition (CVD) method. The structure and electrochemcial performances of carbon paper and CPMCN have been comparatively studied by means of scanning electron microscope (SEM), transmission electron microscope (TEM), N2-BET and cyclic voltammetry. The results show that the electrochemical performances of the electrode were improved greatly when herringbone carbon nanofiber was deposited on the carbon paper. The redox peak currents of VO2+/VO2+ and V3+/V2+ couples on CPMCN electrode were increased largely than that on the carbon paper, and the charge transfer resistances of the redox pairs on CPMCN electrode are also reduced. The enhanced electrochemical activity could be ascribed to the presence of plentiful unsaturated carbon atoms on the sheet edges of carbon nanofiber. The vanadium redox flow battery (VRB) single cell measurement show that energy efficiency and voltage efficiency of single cell with CPMCN as the electrodes are higher than that with carbon paper as the electrodes due to the reduction of electrochemistry polarization.
Vanadium redox flow battery electrode carbon nanofiber electrocatalytic activity electrochemical impedance spectroscopy
Tao Liu Huamin Zhang Chuan Yao Zonghao Liu
Divison of energy storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences,Dalian, Divison of energy storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian Dalian RONGKEPOWER Co. Ltd, Dalian, Liaoning 116025, China
国际会议
大连
英文
68
2012-05-28（万方平台首次上网日期，不代表论文的发表时间）