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Open AccessArticle

Development of Flow Fields for Zinc Slurry Air Flow Batteries

1
Applied Electrochemistry, Fraunhofer Institute for Chemical Technology ICT, Joseph-von-Fraunhofer, Straße 7, 76327 Pfinztal, Germany
2
Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology KIT, Straße am Forum 8, 76131 Karlsruhe, Germany
3
Department of Chemical Engineering, University of Chemistry and Technology Prague, Technická 5, 16628 Prague 6, Czech Republic
4
Faculty of Electrical Engineering and Information Technology, Karlsruhe University of Applied Sciences, Moltkestraße 30, 76133 Karlsruhe, Germany
*
Author to whom correspondence should be addressed.
Batteries 2020, 6(1), 15; https://doi.org/10.3390/batteries6010015
Received: 17 January 2020 / Revised: 18 February 2020 / Accepted: 25 February 2020 / Published: 1 March 2020
(This article belongs to the Special Issue Batteries: Feature Papers 2020)
The flow field design and material composition of the electrode plays an important role in the performance of redox flow batteries, especially when using highly viscous liquids. To enhance the discharge power density of zinc slurry air flow batteries, an optimum slurry distribution in the cell is key. Hence, several types of flow fields (serpentine, parallel, plastic flow frames) were tested in this study to improve the discharge power density of the battery. The serpentine flow field delivered a power density of 55 mW∙cm−2, while parallel and flow frame resulted in 30 mW∙cm−2 and 10 mW∙cm−2, respectively. Moreover, when the anode bipolar plate material was changed from graphite to copper, the power density of the flow frame increased to 65 mW∙cm−2, and further improvement was attained when the bipolar plate material was further changed to copper–nickel. These results show the potential to increase the power density of slurry-based flow batteries by flow field optimization and design of bipolar plate materials. View Full-Text
Keywords: zinc slurry air flow battery; flow fields; slurry flow battery; zinc oxidation zinc slurry air flow battery; flow fields; slurry flow battery; zinc oxidation
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MDPI and ACS Style

Choi, N.H.; del Olmo, D.; Fischer, P.; Pinkwart, K.; Tübke, J. Development of Flow Fields for Zinc Slurry Air Flow Batteries. Batteries 2020, 6, 15.

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