What question did this study set out to answer?

To enhance the cyclability of aqueous zinc-ion batteries by controlling dendrite formation at the zinc anode.

April 12, 2026

Multiscale Interface Engineering From Atomic Heterojunction to Macroscopic Array for Stable Zinc Metal Anode

Key Points

To enhance the cyclability of aqueous zinc-ion batteries by controlling dendrite formation at the zinc anode.
Engineered a bidirectional heterojunction array as an interface layer for the Zn anode.
Used multiscale vertical architecture to regulate electric field and ion flux.
Performed cycling tests at specified current densities to assess anode performance.
Achieved a depth of discharge of 85.5% after cycling.
Sustained stable cycling for over 350 hours at 5 mA cm−2/5 mAh cm−2.
Full cell retained 184.4 mAh g−1 after 10,000 cycles when paired with iodine-based cathode.

Abstract

ABSTRACT Aqueous zinc‐ion batteries hold great promise for sustainable energy storage, yet uncontrolled Zn dendrite formation critically limits their cyclability. To address this issue, a type‐II band alignment‐driven bidirectional heterojunction array is engineered as a multifunctional interface layer for the Zn anode. This multiscale vertical array architecture simultaneously regulates electric field distribution, homogenizes Zn 2+ ion flux, and mitigates electrodeposition stress, thereby promoting uniform and reversible Zn plating/stripping. As a result, the modified anode achieves a high depth of discharge of 85.5% and sustains stable cycling for over 350 h at 5 mA cm −2 /5 mAh cm −2 . When paired with an iodine‐based cathode, the full cell retains 184.4 mAh g −1 after 10 000 cycles. The use of readily available materials, combined with a scalable fabrication approach and rationally designed multiscale interface, offers a practical and inspiring strategy toward high‐performance zinc‐based energy storage systems.

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