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Hybrid Coating with High Zn2+ Selectivity Achieves Stable Zinc Anodes
Shunshun Jia1, Haifeng Bian1, Qing Zhou1
1National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, PR China.
None:
A nano-Zn2SnO4 (ZTO)/cellulose acetate (CA) hybrid coating (CZ) was designed for Zn anodes via a DFT-guided synthesis. DFT calculations revealed ZTO's Zn2+-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 Zn2+ and ZTO, synergistically regulating ion flux. The CZ coating combined superior film-forming ability with high Zn affinity, suppressing side reactions while homogenizing Zn2+ deposition. As a result, CZ-Zn anodes achieved stable cycling for 3000 h at 5 mA cm-2. Full cells paired with NH4V4O10 cathodes exhibited extended cyclability and enhanced rate performance. This work provides a universal strategy for Zn anode protection through multifunctional hybrid coatings.
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