Material scientists reveal how hidden galvanic corrosion drains zinc batteries, and show how a thin protective interface could help make safer, longer-lasting energy storage practical.
A recent study published in the journal Nature Communications investigates a critical degradation pathway that limits the practical deployment of anode-less aqueous zinc batteries. The researchers identify galvanic corrosion between deposited zinc and metallic current collectors as a major previously underappreciated source of irreversible zinc loss. The work advances the understanding of zinc electrode degradation and offers a practical route toward energy-dense, durable aqueous zinc batteries.
Understanding Corrosion-Driven Capacity Loss
Rechargeable aqueous zinc batteries are emerging as promising candidates for large-scale energy storage because they offer low cost, intrinsic safety, and the high theoretical capacity of zinc metal. However, their practical energy density remains limited by the need for substantial excess zinc at the negative electrode. This excess zinc serves as a reservoir to compensate for irreversible zinc losses during repeated cycling, but it also increases cell weight and volume, reducing overall energy-storage efficiency.
