Catalytic production of impurity-free V3.5+ electrolyte for vanadium redox flow batteries

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The vanadium redox flow battery is considered one of the most promising candidates for use in large-scale energy storage systems. However, its commercialization has been hindered due to the high manufacturing cost of the vanadium electrolyte, which is currently prepared using a costly electrolysis method with limited productivity. In this work, we present a simpler method for chemical production of impurity-free V3.5+ electrolyte by utilizing formic acid as a reducing agent and Pt/C as a catalyst. With the catalytic reduction of V4- electrolyte, a high quality V3.5+ electrolyte was successfully produced and excellent cell performance was achieved. Based on the result, a prototype catalytic reactor employing Pt/C-decorated carbon felt was designed, and high-speed, continuous production of V3.5- electrolyte in this manner was demonstrated with the reactor. This invention offers a simple but practical strategy to reduce the production cost of V(3.5+ )electrolyte while retaining quality that is adequate for high-performance operations.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2019-09
Language
English
Article Type
Article
Citation

NATURE COMMUNICATIONS, v.10

ISSN
2041-1723
DOI
10.1038/s41467-019-12363-7
URI
http://hdl.handle.net/10203/268046
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
Nature Communications(2019)- Catalytic production of impurity free V3.5+ electrolyte for vanadium redox flow batteries.pdf(1.9 MB)Download
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