Citation: HE Meng-Jiao, YAN Kang-Ping, WANG Gui-Xin, SUN Yu-Han, ZHONG Yi-Yei, LUO Chun-Hui. Electrochemical Performance of Graphite Felts Modified by Potentiostatic Oxidization for Oxygen Reduction Cathode[J]. Chinese Journal of Inorganic Chemistry, ;2017, 33(2): 315-322. doi: 10.11862/CJIC.2017.018 shu

Electrochemical Performance of Graphite Felts Modified by Potentiostatic Oxidization for Oxygen Reduction Cathode

College of Chemical Engineering, Sichuan University, Chengdu 610065, China

Corresponding author: YAN Kang-Ping, cyankp@scu.edu.cn LUO Chun-Hui, luochunhui@scu.edu.cn
Received Date: 18 May 2016
Revised Date: 27 October 2016

Figures(10)

The graphite felts were respectively modified by cyclic voltammetry (CV)and potentiostatic oxidation (PO), which electrochemical performances were evaluated by cyclic voltammetric experiments. As a result, PO modification is more effective on improving the oxygen reduction reaction (ORR)activity of the graphite felts than CV treatment. The PO modified graphite felts were further investigated by XRD, FTIR, Contact angle and CV. It is found that the wettability of the graphite felts increases with the increase of potentiostatic oxidation time, due to the increase of the hydrophilic oxygen-containing functional groups on surface. The graphite felt modified by PO for 25 min in this work exhibits the preferable electrochemical performances with the reduction potential ~-0.43 V and the current density ~0.003 4 mA·cm^-2 of the reduction peak on CV curve. Consequently, potentiostatic oxidation is an effective and feasible treatment for improving the electrochemical properties of the graphite felts as the electrode material of Li-O₂ batteries.
- oxygen cathode,
- graphite felts,
- modification,
- potentiostatic oxidation,
- cyclic voltammetry
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