Abstract
Electrolyte is a critical component that impacts many aspects of zinc-air battery (ZAB) performance, such as rechargeability, power density, and lifespan. While alkaline aqueous electrolytes are popular for their high ionic conductivity, low cost, and accessibility, they suffer side reactions that can negatively affect battery life. To address this issue, we investigate the use of additives to enhance the ionic strength and modify the processes in the battery cell. Our results demonstrate that adding KI into the electrolyte improves overall stability by 24 % and increases roundtrip efficiency by 20 %. Furthermore, adding iodide species changes the charging mechanism of the battery, resulting in a lower charging voltage and increased efficiency. Our study provides insights into optimizing the electrolyte composition in ZABs, which is crucial for developing more efficient and durable energy storage systems.
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