Electrochemical study of Co(II)/Co(III) on different electrode materials for energy storage in redox flow cells


López-Estrada, Salvador A, Alatorre-Ordaz, Alejandro, Gutiérrez-Granados, Silvia, Ponce de Leon, Carlos and Walsh, Franck C. (2009) Electrochemical study of Co(II)/Co(III) on different electrode materials for energy storage in redox flow cells. Electrochemical Society transactions. The Electrochemical Society, 20, (1), 237-247. (doi:10.1149/1.3268391).

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Original Publication URL: http://dx.doi.org/10.1149/1.3268391

Description/Abstract

The development of redox flow cells has been carried out through
the use of several redox couples which oxidize and reduce to store
electrical energy. Some problems encountered in redox cells
include: low solubility of redox couples, slow kinetics, low
stability of electrode materials and high toxicity of electroactive
species. In this paper, Co(III)/Co(II) has been investigated as a
possible electroactive material because of its high oxidizing
power and the relatively low toxicity of Co(III). The
electrochemical study of Co(III)/Co(II) was carried out on
different electrode materials such as glassy carbon, Au, Pt, Pb and
stainless steel. Results show that the high oxidizing power of
Co(III) does not enable to observe its reduction reaction in the
aforementioned electrode materials possibly due to electrode
surface corrosion and/or water oxidation. However, the
electrolysis of Co(III) with a Pb electrode shows that the system is
reversible and forms PbO2 on the electrode surface

Item Type: Article
Additional Information: 24th Meeting of The Mexican Electrochemical Society and 2nd Meeting of the Mexican Section of the Electrochemical Society, May 31 - June 5, 2009 , Puerto Vallarta, Mexico MES 24: Electrochemical Applications to Biology, Nanotechnology, and Environmental Engineering and Materials Editor(s): M. Palomar-Pardavé, I. Gonzales, M. Romero-Romo, N. Casillas, M. Soto
ISSNs: 1938-5862 (print)
Related URLs:
Keywords: redox flow cells, energy storage
Subjects: T Technology > TP Chemical technology
Q Science > QD Chemistry
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 69889
Date Deposited: 09 Dec 2009
Last Modified: 27 Mar 2014 18:49
URI: http://eprints.soton.ac.uk/id/eprint/69889

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