Performance and mechanism of Prussian blue (PB) modified carbon felt electrode
Prussian blue (PB) modified carbon felt electrodes were prepared. The electrochemical behavior was investigated by cyclic voltammetry, electrochemical impedance spectroscopy and charge-discharge experiments. In order to distinguish the mechanism of the PB modified carbon felt electrode, the electrochemical quartz crystal microbalance (EQCM)was employed. The results of cyclic voltammetry show that the modification can improve the reversibility and the suitable PB deposition is the amount of 10 circles deposition. PB modified carbon felt electrode can effectively decrease the charge transfer resistance. The voltage efficiency of VRB employing PB modified carbon felt electrode can be increased by 12%. The mass change of the PB modified Pt crystal electrode in the process of the potential scan is obvious. The reaction of substitution of VO2+ for high-spin Fe ion in PB is probable to happen and the possible reaction equation is given. The preliminary exploration shows that PB modified carbon felt is electrochemically promising for redox flow battery.
porous electrode carbon felt redoz flow battery (RFB) Prussian blue electrochemical quartz crystal microbalance
XUE Fang-qin ZHANG Hong-tao WU Chun-xu NING Tao XU Xuan
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China Department of Environmental Science and Engineering, Tsinghua University,Beijing 100084, China Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084,China
国际会议
2009 Frontier Symposium of China Postductors on Materrials Science(2009年中国博士后材料科学前言论坛)
长沙
英文
594-599
2009-11-22（万方平台首次上网日期，不代表论文的发表时间）