A new strategy for integrating abundant oxygen functional groups into carbon felt electrode for vanadium redox flow batteries

• DOI: 10.1038/srep06906
• Publication Date: 2014-11-04T10:12:56Z
• Authors: Ki Jae Kim; Seung-Wook Lee; Taeeun Yim; Jae-Geun Kim; Jang Wook Choi; Jung Ho Kim; Min-Sik Park; Young-Jun Kim
• Keywords: Carbon fibers; Surface Modification

The effects of surface treatment combining corona discharge and hydrogen peroxide (H2O2) on the electrochemical performance carbon felt electrodes for vanadium redox flow batteries (VRFBs) have been thoroughly investigated. A high concentration oxygen functional groups has successfully introduced onto by a specially designed treatment, which is mainly responsible improving energy efficiency VRFBs. In addition, wettability also can be significantly improved. VRFB cell employing modified improved 7% at current density (148 mA cm−2). Such improvement attributed to faster charge transfer better allowed surface-active groups. Moreover, this method much more competitive than other treatments in terms processing time, production costs performance.