Charge/discharge cycles on Pt and Pt-Ir based electrodes for the positive side of the Zinc-Cerium hybrid redox flow battery

Berlouis, Leonard and Nikiforidis, Georgios and Hall, David and Hodgson, David (2014) Charge/discharge cycles on Pt and Pt-Ir based electrodes for the positive side of the Zinc-Cerium hybrid redox flow battery. Electrochimica Acta, 125. pp. 176-182. ISSN 0013-4686 (https://doi.org/10.1016/j.electacta.2014.01.075)

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Abstract

tIn this study, the charge/discharge cycling behaviour of the Ce3+/Ce4+redox couple in methanesulfonicacid medium on various Pt and Pt-Ir coated titania based substrates was investigated as a function ofsolution flow rate, temperature and charge/discharge current density using a rotating disk electrode.Although superior performances (in terms of the voltage efficiency, V) were obtained from the electrodescontaining higher amounts of platinum, a deterioration of these electrodes with cycling was evident (after150 cycles). At rotation rates between 600 rpm and 1200 rpm, high V(>90%) could be obtained as longas the current density j applied was below the mass transport limiting current density, jL. For j’s abovethis value, the oxygen evolution reaction occurred with Ce3+oxidation whereas the Ce4+reduction wasaccompanied by oxygen reduction, resulting in lowered V’s. Better stability towards cycling and higherV’s were observed at 60◦C compared to 25◦C, especially for the etched Pt electrodes. The optimumloading for the Pt substrates was 3 g m−2while for the case of the heat treated samples 10 g m−2of Pt.

ORCID iDs

Berlouis, Leonard ORCID logoORCID: https://orcid.org/0000-0002-7217-1680, Nikiforidis, Georgios, Hall, David and Hodgson, David;
  • Item type:Article
    ID code:50717
    Dates:
    Date
    Event
    10 April 2014
    Published
    28 January 2014
    Published Online
    14 January 2014
    Accepted
    Subjects:Science > Chemistry
    Department:Faculty of Science > Pure and Applied Chemistry
    Depositing user: Pure Administrator
    Date deposited:09 Dec 2014 15:54
    Last modified:11 Nov 2024 10:53
    URI:https://strathprints.strath.ac.uk/id/eprint/50717
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