Corrosion and Degradation in Aqueous Zn-based Batteries

Aqueous zinc-based batteries have emerged as promising contenders in the realm of energy storage owing to their high safety, low cost and environmental friendliness. However, their practical implementation faces substantial challenges stemming from corrosion and related degradation issues that impact their performance and longevity. The inherent thermodynamic instability of the Zn metal in aqueous electrolytes initiates detrimental side reactions at the electrode/electrolyte interface, leading to reduced Zn anode reversibility and continuous performance deterioration. This chapter offers an in-depth exploration of the corrosion mechanisms affecting Zn metal anodes in both alkaline and mild/acidic electrolytes, elucidating the adverse effects and ensuing issues. Additionally, comprehensive insights into recent advancements in mitigating corrosion are provided, encompassing multifaceted strategies such as electrode modifications, electrolyte innovations and interface enhancements. Finally, some perspectives on challenges and concerns in future research are presented.