Zinc metal anodes face several challenges,including the uncontrolled formation of dendrites,hydrogen evolution,and corrosion,which seriously hinder their application in practice.To address the above prob-lems such as dendrite formation and corrosion,we present a simple and applicable immersion method that enables in situ formation of a zinc phytate(PAZ)coating on the surface of commercial Zn flakes via a substitution reaction.This protective coating mitigates corrosion of zinc flakes by the electrolyte,reduces the interfacial impedance,and accelerates the migration kinetics of zinc ions.Besides,this method can preferentially expose the(002)crystal plane with strong atomic bonding,which not only improves the corrosion resistance of the zinc flake,but can also guide the parallel deposition of zinc ions along the(002)crystal plane and reduce the formation of dendrites.Benefiting from the above advan-tages,the PAZ@Zn||Cu half-cell has shown over 900 cycles with average coulombic efficiency(CE)of 99.81％at 4 mA cm-2.Besides,the PAZ@Zn||PAZ@Zn symmetric cell operate stably for＞1000 h at 5 mA cm-2 and＞340 h at 10 mA cm-2.Furthermore,we demonstrated that this in situ chemical treat-ment enables the formation of a robust,well-bound protective coating.This method provides insights for advancing the commercialization of zinc anodes and other metal anodes.

Hao Fu;Qing Wen;Pei-Yao Li;Zhen-yu Wang;Zhen-jiang He;Cheng Yan;Jing Mao;Kehua Dai;Xia-hui Zhang;Jun-chao Zheng

School of Metallurgy and Environment,Central South University,Changsha 410083,Hunan,China;Engineering Research Center of the Ministry of Education for Advanced Battery Materials,Central South University,Changsha 410083,Hunan,China;School of Mechanical,Medical and Process Engineering,Queensland University of Technology,Brisbane,Queensland 4001,Australia;School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China;College of Chemistry,Tianjin Normal University,Tianjin 300387,China;School of Mechanical and Materials Engineering,Washington State University,Pullman,Washington 99164,United States

能源化学

[1]Hao Fu;Qing Wen;Pei-Yao Li;Zhen-yu Wang;Zhen-jiang He;Cheng Yan;Jing Mao;Kehua Dai;Xia-hui Zhang;Jun-chao Zheng-.In-situ chemical conversion film for stabilizing zinc metal anodes)[J].能源化学,2022(10):387-393

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