Zincophilic Electrode Interphase with Appended Proton Reservoir Ability Stabilizes Zn Metal Anodes

Zhenyue Xing; Yanyan Sun; Xuesong Xie; Yan Tang; Guofu Xu; Junwei Han; Bingan Lu; Shuquan Liang; Gen Chen; Jiang Zhou

doi:10.1002/anie.202215324

Zincophilic Electrode Interphase with Appended Proton Reservoir Ability Stabilizes Zn Metal Anodes

Angew Chem Int Ed Engl. 2023 Jan 26;62(5):e202215324. doi: 10.1002/anie.202215324. Epub 2022 Dec 22.

Authors

Zhenyue Xing¹, Yanyan Sun¹, Xuesong Xie¹, Yan Tang¹, Guofu Xu¹, Junwei Han², Bingan Lu³, Shuquan Liang¹, Gen Chen¹, Jiang Zhou^{1

4}

Affiliations

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.
² School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P. R. China.
³ School of Physics and Electronics, Hunan University, Changsha, Hunan 410082, P. R. China.
⁴ College of Chemistry and Chemical Engineering, Jishou University, Jishou, Hunan 416000, P. R. China.

PMID: 36446732
DOI: 10.1002/anie.202215324

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//V₆ O₁₃ 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.

Abstract

Grants and funding