3D‑Printed Multi‑Channel Metal Lattices Enabling Localized Electric‑Field Redistribution for Dendrite‑Free Aqueous Zn Ion Batteries

Advances in portable electronics, electric vehicles, and grid energy storage drive the demand for reliable energy storage. Aqueous rechargeable zinc‑ion batteries (ZIBs) are favored for their environmental friendliness, low cost, and high safety [1]. However, challenges like dendrite growth and side reactions of the zinc anode hinder widespread adoption. Zinc dendrites can pierce separators, causing short circuits. Traditional conductive hosts promote dendrite formation due to their low surface area. Constructing a 3D high‑surface‑area zinc anode helps inhibit dendrite formation, but pure zinc 3D sponge electrodes suffer structural damage during repeated cycles. Additionally, zinc anodes obtained through various methods may hinder ion diffusion and create void spaces without zinc deposition [2]. To address these issues, we proposed a strategy involving 3D printing and electroless deposition to create a conductive 3D nickel lattice (3D Ni) current collector.

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