Determining Vanadium Concentrations Using the UV-Vis Response Method

    Authors

    R. P. Brooker; C. J. Bell; L. J. Bonville; H. R. Kunz;J. M. Fenton

    Comments

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    Abbreviated Journal Title

    J. Electrochem. Soc.

    Keywords

    REDOX FLOW BATTERY; CHARGE; STATE; Electrochemistry; Materials Science, Coatings & Films

    Abstract

    The ability to determine the state of charge of vanadium solutions is critical to understanding reaction mechanisms and charge transport dynamics. This paper describes in detail the methods used to generate quantitative concentrations of three of the four species in an all-vanadium flow battery. The UV-Vis method was shown to provide concentration values that were more reliable than using either an electrode voltage or the integrated current with respect to time. Furthermore, a method was proposed to bring flow battery system into charge balance by independently reducing the negative electrolyte. (C) The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org. All rights reserved.

    Journal Title

    Journal of the Electrochemical Society

    Volume

    162

    Issue/Number

    4

    Publication Date

    1-1-2015

    Document Type

    Article

    Language

    English

    First Page

    A608

    Last Page

    A613

    WOS Identifier

    WOS:000349827200015

    ISSN

    0013-4651

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