Document Type

Journal Article

Publication Date

2025

Keywords

Operando characterizations, Ni-Zn alkaline battery, ZnO anode, AA cylindrical cell

DOI

https://doi.org/10.1016/j.jpowsour.2025.236842

Abstract

Rechargeable Ni-Zn alkaline batteries are of growing interest due to their intrinsic safety, high energy density, and environmental friendliness. To optimize the performance of the ZnO electrode in these batteries, it is essential to understand complex transformations that occur during charge and discharge of the reaction: . In this study, we employ a series of operando characterization techniques, including X-ray diffraction (XRD), Raman spectroscopy, and online electrochemical mass spectroscopy (OEMS), to investigate the surface dynamics on the ZnO electrode. Our findings reveal the significant impacts of decoupling the chemical and electrochemical processes, resulting in hydrogen gas evolution, diffusion of anions in alkaline electrolyte, and other side reactions. Importantly, by adjusting the current densities during charge and discharge, these effects can be modulated. This study provides valuable insights into the complex surface reactions, which can ultimately contribute to the advancement and commercialization of Ni-Zn batteries.

Source Publication

Journal of Power Sources

ISSN

0378-7753

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