Journal
APPLIED ENERGY
Volume 109, Issue -, Pages 344-351Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2013.02.001
Keywords
All-vanadium redox flow battery; Graphene-supported; PAN-functionalized felt; Energy storage; Electrochemical properties
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Funding
- European Regional Development Funds (ERDF, FEDER Programa Competitivitat de Catalunya)
- Ministerio de Economia y Competitividad-INNPACTO, Project REDOX [IPT-2011-1690-920000]
- CONSOLIDER Ingenio, Project MULTICAT [CSD2009-00050]
- NANO-EN ESTO Project [MAT2010-21510]
- EIT
- KIC-InnoEnergy under the Project KIC-EES [33_2011_IP29_Electric Energy Storage]
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Two strategies for improving the electroactivity towards VO2+/VO2+ redox pair, the limiting process in all-vanadium redox flow batteries (VFBs), were presented. CuPt3 nanoparticles supported onto graphene substrate and nitrogen and oxygen polyacrylonitrile (PAN)-functionalized electrodes materials have been evaluated. The morphology, composition, electrochemical properties of all electrodes prepared was characterized with field emission-scanning electrode microscopy, X-ray photoelectron spectroscopy, cyclic voltammetry, electrochemical impedance spectroscopy and cell charge-discharge test. The presence of the CuPt3 nanocubes and nitrogen and oxygen functionalities enhance the electrocatalytic activity of the electrodes materials accelerating the oxygen and electron transfer processes. The battery performance was also evaluated using PAN-functionalized electrodes exhibiting a high of energy efficiency of 84% (at current density 20 mA cm(-2)) up to 30th cycle, indicating a promising alternative for improving the VFB. (c) 2013 Elsevier Ltd. All rights reserved.
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