Highly accurate apparatus for electrochemical characterization of the felt electrodes used in redox flow batteries

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Because of the rise in renewable energy use, the redox flow battery (RFB) has attracted extensive attention as an energy storage system. Thus, many studies have focused on improving the performance of the felt electrodes used in RFBs. However, existing analysis cells are unsuitable for characterizing felt electrodes because of their complex 3-dimensional structure. Analysis is also greatly affected by the measurement conditions, viz. compression ratio, contact area, and contact strength between the felt and current collector. To address the growing need for practical analytical apparatus, we report a new analysis cell for accurate electrochemical characterization of felt electrodes under various conditions, and compare it with previous ones. In this cell, the measurement conditions can be exhaustively controlled with a compression supporter. The cell showed excellent reproducibility in cyclic voltammetry analysis and the results agreed well with actual RFB charge-discharge performance. (C) 2016 Elsevier B.V. All rights reserved
Publisher
ELSEVIER SCIENCE BV
Issue Date
2016-04
Language
English
Article Type
Article
Keywords

CARBON FELT; GRAPHITE FELT; POSITIVE ELECTRODE; ENERGY-STORAGE; CHEMICAL-MODIFICATION; COMPOSITE ELECTRODE; MESOPOROUS CARBON; PERFORMANCE; CATALYST; PROGRESS

Citation

JOURNAL OF POWER SOURCES, v.310, pp.137 - 144

ISSN
0378-7753
DOI
10.1016/j.jpowsour.2016.02.005
URI
http://hdl.handle.net/10203/208738
Appears in Collection
CBE-Journal Papers(저널논문)
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