通过在电解质或隔膜中添加钙离子来提高锌空气电池的循环寿命。

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

作者信息

Zhang Donghao, Hu Wenbin

机构信息

Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, No. 135 Yaguan Road, Tianjin 300072, China.

Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, No. 135 Yaguan Road, Tianjin 300072, China.

出版信息

Nanomaterials (Basel). 2023 Jun 15;13(12):1864. doi: 10.3390/nano13121864.

DOI:10.3390/nano13121864

PMID:37368294

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10302342/

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 (Ca) 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 on electrolyte carbonation. With the modified electrolyte and separator, the cycle life of ZABs was improved by 22.2% and 24.7%, respectively. Ca was introduced into the ZAB system to preferentially react with CO rather than K and then precipitated granular CaCO prior to KCO, which was deposited on the surface of the Zn anode and air cathode to form a flower-like CaCO layer, thereby prolonging its cycle life.

摘要

电解质碳酸化以及由此导致的空气电极堵塞是限制水系碱性锌空气电池（ZABs）循环寿命的主要因素。在这项工作中，将钙离子（Ca）添加剂引入电解质和隔膜中以解决上述问题。进行恒电流充放电循环测试以验证Ca对电解质碳酸化的影响。使用改性后的电解质和隔膜，ZABs的循环寿命分别提高了22.2%和24.7%。将Ca引入ZAB系统中，使其优先与CO而非K反应，然后在KCO之前沉淀出颗粒状CaCO，KCO沉积在锌阳极和空气阴极表面形成花状CaCO层，从而延长其循环寿命。