Abstract：
: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.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Kim KJ,Lee SW,Yim T,Kim JG,Choi JW,Kim JH,Park MS,Kim YJdoi
10.1038/srep06906subject
Has Abstractpub_date
2014-11-04 00:00:00pages
6906issn
2045-2322pii
srep06906journal_volume
4pub_type
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