Journal
CARBON
Volume 136, Issue -, Pages 444-453Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2018.04.038
Keywords
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Funding
- Generalitat de Catalunya through the CERCA Program
- M2E [2017SGR1246]
- Fundacion Ramon Areces funding through BAT-LIMET project
- MINECO [ENE2016-80788-C5-5-R]
- Spanish government [FJCI-2014-19745]
- Iranian National Committee of Nanotechnology in Ministry of Science, Research and Technology
- office of Vice Chancellor in Charge of Research of University of Tabriz
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Although Vanadium Redox Flow Batteries (VRFB) are suitable for grid-scale applications, their power-related cost must be reduced in order to boost the use of this technology in the market, allowing their widespread commercialization. One effective way to make the VRFB a competitive and viable solution could be through new strategies for improving the electrocatalytic activity of the electrodes with enhanced electrolyte/electrode interface characteristics. Herein, we report the synergistic effect demonstrated by N- and WO3- decorated carbon-based positive electrode, named HTNW electrode, which demonstrates the feasibility of achieving: i) enhanced electrocatalytic activity, achieving large current density and high reversibility towards VO2+/VO2+ couple (promotion of oxygen and electron transfer processes), ii) decrement of the electron-transfer resistance from 76.18 Omega to 13.00 Omega for the pristine electrode and HTNW electrodes, respectively; iii) 51% of the electrolyte utilization ratio at high rates (i.e. 200 mA cm(-2)) with 70% of energy efficiency; iv) increment of more than 50% of the power-peak in comparison with pristine electrode. (C) 2018 Elsevier Ltd. All rights reserved.
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