Strategies for enhancing electrochemical activity of carbon-based electrodes for all-vanadium redox flow batteries

Cristina Flox, Marcel Skoumal, Javier Rubio-Garcia, Teresa Andreu and Juan Ramón Morante

Applied Energy, 2013, vol. 109, issue C, 344-351

Abstract: 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 20mAcm−2) up to 30th cycle, indicating a promising alternative for improving the VFB.

Keywords: All-vanadium redox flow battery; Graphene-supported; PAN-functionalized felt; Energy storage; Electrochemical properties (search for similar items in EconPapers)
Date: 2013
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (15)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:109:y:2013:i:c:p:344-351

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DOI: 10.1016/j.apenergy.2013.02.001

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