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Zincophilic Electrode Interphase with Appended Proton Reservoir Ability Stabilizes Zn Metal Anodes |
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| Authors: | Zhenyue Xing Yanyan Sun Xuesong Xie Yan Tang Prof Guofu Xu Prof Junwei Han Prof Bingan Lu Prof Shuquan Liang Ass Prof Gen Chen Prof Jiang Zhou |
| Institution: | 1. School of Materials Science and Engineering, Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional Materials, Central South University Changsha, Hunan, 410083 P. R. China
Contribution: Conceptualization (equal), Data curation (lead), Formal analysis (lead), Investigation (lead), Writing - original draft (lead);2. School of Materials Science and Engineering, Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional Materials, Central South University Changsha, Hunan, 410083 P. R. China Contribution: Formal analysis (equal), Investigation (supporting), Writing - review & editing (equal);3. School of Materials Science and Engineering, Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional Materials, Central South University Changsha, Hunan, 410083 P. R. China Contribution: Conceptualization (supporting), Investigation (supporting);4. School of Materials Science and Engineering, Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional Materials, Central South University Changsha, Hunan, 410083 P. R. China Contribution: Writing - review & editing (supporting);5. School of Materials Science and Engineering, Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional Materials, Central South University Changsha, Hunan, 410083 P. R. China Contribution: Supervision (supporting), Writing - review & editing (supporting);6. School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083 P. R. China Contribution: Funding acquisition (equal), Validation (lead), Writing - review & editing (supporting);7. School of Physics and Electronics, Hunan University, Changsha, Hunan 410082 P. R. China Contribution: Investigation (supporting), Writing - review & editing (supporting);8. School of Materials Science and Engineering, Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional Materials, Central South University Changsha, Hunan, 410083 P. R. China Contribution: Project administration (supporting), Writing - review & editing (supporting);9. School of Materials Science and Engineering, Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional Materials, Central South University Changsha, Hunan, 410083 P. R. China |
| Abstract: | The rampant dendrites and hydrogen evolution reaction (HER) resulting from the turbulent interfacial evolution at the anode/electrolyte are the main culprits of short lifespan and low Coulombic efficiency of Zn metal batteries. In this work, a versatile protective coating with excellent zincophilic and amphoteric features is constructed on the surface of Zn metal (ZP@Zn) as dendrite-free anodes. This kind of protective coating possesses the advantages of reversible proton storage and rapid desolvation kinetics, thereby mitigating the HER and facilitating homogeneous nucleation concomitantly. Furthermore, the space charge polarization effect promotes charge redistribution to achieve uniform Zn deposition. Accordingly, the ZP@Zn symmetric cell manifests excellent reversibility at an ultrahigh cumulative plating capacity of 4700 mAh cm−2 and stable cycling at 80 % depth of discharge (DOD). The ZP@Zn//V6O13 pouch cell also reveals superior cycling stability with a high capacity of 326.6 mAh g−1. |
| Keywords: | Amphoteric Group Aqueous Zn Ion Batteries Dendrite-Free Zn Anode Hydrogen Evolution Interfacial Modification |