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Improving Cycle Life of Zinc-Air Batteries with Calcium Ion Additive in Electrolyte or Separator.

ABSTRACT: The electrolyte carbonation and the resulting air electrode plugging are the primary factors limiting the cycle life of aqueous alkaline zinc-air batteries (ZABs). In this work, calcium ion (Ca²⁺) additives were introduced into the electrolyte and the separator to resolve the above issues. Galvanostatic charge-discharge cycle tests were carried out to verify the effect of Ca²⁺ on electrolyte carbonation. With the modified electrolyte and separator, the cycle life of ZABs was improved by 22.2% and 24.7%, respectively. Ca²⁺ was introduced into the ZAB system to preferentially react with CO₃^2- rather than K⁺ and then precipitated granular CaCO₃ prior to K₂CO₃, which was deposited on the surface of the Zn anode and air cathode to form a flower-like CaCO₃ layer, thereby prolonging its cycle life.

SUBMITTER: Zhang D

PROVIDER: S-EPMC10302342 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature

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Improving Cycle Life of Zinc-Air Batteries with Calcium Ion Additive in Electrolyte or Separator.

Zhang Donghao D Hu Wenbin W

Nanomaterials (Basel, Switzerland) 20230615 12

The electrolyte carbonation and the resulting air electrode plugging are the primary factors limiting the cycle life of aqueous alkaline zinc-air batteries (ZABs). In this work, calcium ion (Ca<sup>2+</sup>) additives were introduced into the electrolyte and the separator to resolve the above issues. Galvanostatic charge-discharge cycle tests were carried out to verify the effect of Ca<sup>2+</sup> on electrolyte carbonation. With the modified electrolyte and separator, the cycle life of ZABs wa ...[more]

PMID: 37368294

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