Hybrid Coating with High Zn<sup>2+</sup> Selectivity Achieves Stable Zinc Anodes.
basic_science · Level V
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- Record sourced from PubMed, PMID 41105946.
- Also identified by DOI 10.1021/acs.nanolett.5c04178.
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Abstract
A nano-Zn<sub>2</sub>SnO<sub>4</sub> (ZTO)/cellulose acetate (CA) hybrid coating (CZ) was designed for Zn anodes via a DFT-guided synthesis. DFT calculations revealed ZTO's Zn<sup>2+</sup>-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<sup>2+</sup> and ZTO, synergistically regulating ion flux. The CZ coating combined superior film-forming ability with high Zn affinity, suppressing side reactions while homogenizing Zn<sup>2+</sup> deposition. As a result, CZ-Zn anodes achieved stable cycling for 3000 h at 5 mA cm<sup>-2</sup>. Full cells paired with NH<sub>4</sub>V<sub>4</sub>O<sub>10</sub> cathodes exhibited extended cyclability and enhanced rate performance. This work provides a universal strategy for Zn anode protection through multifunctional hybrid coatings.