Hybrid Coating with High Zn 2+ Selectivity Achieves Stable Zinc Anodes

A nano-Zn 2 SnO 4 (ZTO)/cellulose acetate (CA) hybrid coating (CZ) was designed for Zn anodes via a DFT-guided synthesis. DFT calculations revealed ZTO’s Zn 2+ -selectivity and low migration barriers, enabling dual ion-sieving and acceleration effects. The C═O groups in CA formed Lewis acid–base pairs with desolvated Zn 2+ and ZTO, synergistically regulating ion flux. The CZ coating combined superior film-forming ability with high Zn affinity, suppressing side reactions while homogenizing Zn 2+ deposition. As a result, CZ–Zn anodes achieved stable cycling for 3000 h at 5 mA cm –2 . Full cells paired with NH 4 V 4 O 10 cathodes exhibited extended cyclability and enhanced rate performance. This work provides a universal strategy for Zn anode protection through multifunctional hybrid coatings.