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RuO2/MWCNT/ stainless steel mesh as a novel positive electrode in vanadium redox flow batteries

Gobal, F ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1039/c5ra12342a
  3. Publisher: Royal Society of Chemistry , 2015
  4. Abstract:
  5. The present work describes the preparation and electrochemical characterization of RuO2/MWCNT/Stainless Steel Mesh (SSM) electrode as compared with a MWCNT/SSM electrode in the positive half-cell of a Vanadium Redox Flow Battery (VRFB). The electrochemical characterization of prepared electrode was carried out using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge/discharge procedures. The electrochemical activity of MWCNT/SSM modified with RuO2 as positive electrode in a VRFB was notably improved. The RuO2-included electrodes demonstrated high peak current ratio, small peak potential difference and high electron transfer rate constant, confirming excellent electro-catalytic activity and reversibility. These good electrochemical results, together with the long term stability of the prepared electrode, represent a significant step forward in the development of highly effective positive electrode materials for VRFBs
  6. Keywords:
  7. Catalyst activity ; Cyclic voltammetry ; Electric batteries ; Electrochemical impedance spectroscopy ; Electrodes ; Flow batteries ; Mesh generation ; Multiwalled carbon nanotubes (MWCN) ; Rate constants ; Ruthenium alloys ; Secondary batteries ; Stainless steel ; Vanadium ; Electrocatalytic activity ; Electrochemical activities ; Electrochemical characterizations ; Electron-transfer rate constants ; Galvanostatic charge/discharge ; Positive electrode materials ; Stainless steel mesh ; Vanadium redox flow batteries ; Electrochemical electrodes
  8. Source: RSC Advances ; Volume 5, Issue 84 , Aug , 2015 , Pages 68378-68384 ; 20462069 (ISSN)
  9. URL: http://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/C5RA12342A#!divAbstract