In-situ observation of the degradation of all-vanadium redox flow batteries with dynamic hydrogen reference electrode under real operation conditions

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To identify the major degradation mechanism of vanadium redox flow batteries (VRFBs) during cycling under practical operation conditions, an electrochemical impedance analysis is conducted by using dynamic hydrogen electrode (DHE) as a reference electrode. The increased ohmic resistance and charge transfer resistances of the electrodes with cycling are responsible for the performance fade. Spectroscopic and postmortem analysis indicate that the degradation of the carbon felt electrode, which lowers surface conductivity, results in the increases in ohmic and charge transfer resistances. Therefore, the chemical stability of electrode should be improved for achieving more durable VRFBs. (C) 2018 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE INC
Issue Date
2019-02
Language
English
Article Type
Article
Citation

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v.70, pp.355 - 362

ISSN
1226-086X
DOI
10.1016/j.jiec.2018.10.036
URI
http://hdl.handle.net/10203/250356
Appears in Collection
CBE-Journal Papers(저널논문)
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