Effect of cell design on the durability of secondary zinc-air batteries

Aroa R. Mainar, Elena Iruin, Idoia Urdampilleta, Hans-Jürgen Grande and J. Alberto Blázquez

Applied Energy, 2024, vol. 353, issue PA, No S0306261923014137

Abstract: Secondary zinc-air batteries (ZAB) are promising sustainable energy storage systems, but their practical implementation has been hindered by a focus on materials, electrode/electrolyte design and formulations that do not translate into an efficient energy storage device. The prevailing cell design features an oversized zinc anode and an unbalanced electrolyte. As a result, the depth of discharge (DoD) of the zinc anode is typically low (<10%) and the durability of tests usually is limited to 500 h. This study focuses on evaluating the electrochemical impact of different cell designs for zinc-air batteries (ZABs) and highlights the critical role of positioning an electrolyte reservoir in close proximity to the zinc anode where a lifetime of up to 4000 h have been obtained. Our tests also involve high utilization of the zinc anode, ranging from 17.5% to 70.0% of the depth of discharge (DoD), equivalent to 136–546 mAh/gZn.

Keywords: Zinc-air battery; Cell design; Aqueous alkaline electrolyte; Carbon free electrode (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1016/j.apenergy.2023.122049

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