English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/88989
logo share SHARE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Enhanced performance of a Bi-modified graphite felt as the positive electrode of a vanadium redox flow battery

AuthorsGonzález Arias, Zoraida ; Sánchez Sánchez, Ángela ; Blanco Rodríguez, Clara ; Granda Ferreira, Marcos ; Menéndez López, Rosa María ; Santamaría Ramírez, Ricardo
KeywordsVanadium redox flow battery
Graphite felt
Bi-modified electrode
Active surface area
Electrical conductivity
Cyclic voltammetry
Issue DateDec-2011
CitationElectrochemistry Communications 13(12): 1379–1382 (2011)
Abstract[EN] Graphite felt modified with nanodispersed bismuth was studied as electrode in the positive half-cell of a vanadium redox flow battery (VRFB). The felt was easily modified by immersion in a Bi2O3 solution followed by thermal reduction at 450 °C in air. Despite the low metal content (1 at.%) on the surface of the fibers, the Bi-modified felt showed an excellent electrochemical performance (at 1 mV s− 1) in terms of anodic and cathodic peak current densities (21 and 17 mA cm–2, respectively), reversibility (ΔEp = 0.050 V) and overpotential for the V(IV)/V(V) redox reactions. Furthermore, repetitive cyclic voltammetry measurements, at various scan rates, evidenced the long term stability of this material. These results demonstrate that bismuth nanoparticles on the carbon surface act as stable active sites to promote these reactions, and represent a significant step forward towards the development of outstanding electrode materials for VRFB.
Publisher version (URL)http://dx.doi.org/10.1016/j.elecom.2011.08.017
Appears in Collections:(INCAR) Artículos
Files in This Item:
File Description SizeFormat 
Enhanced performance_Zoraida.pdf929,33 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.