文章基本信息

标题：A new strategy for integrating abundant oxygen functional groups into carbon felt electrode for vanadium redox flow batteries
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作者：Ki Jae Kim ; Seung-Wook Lee ; Taeeun Yim 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep06906
语种：English
出版社：Springer Nature
摘要：The effects of surface treatment combining corona discharge and hydrogen peroxide (H₂O₂) on the electrochemical performance of carbon felt electrodes for vanadium redox flow batteries (VRFBs) have been thoroughly investigated. A high concentration of oxygen functional groups has been successfully introduced onto the surface of the carbon felt electrodes by a specially designed surface treatment, which is mainly responsible for improving the energy efficiency of VRFBs. In addition, the wettability of the carbon felt electrodes also can be significantly improved. The energy efficiency of the VRFB cell employing the surface modified carbon felt electrodes is improved by 7% at high current density (148 mA cm⁻²). Such improvement is attributed to the faster charge transfer and better wettability allowed by surface-active oxygen functional groups. Moreover, this method is much more competitive than other surface treatments in terms of processing time, production costs, and electrochemical performance.