Toward dendrite-free and anti-corrosion Zn anodes by regulating a bismuth-based energizer

查看全文 作　　者：Mingming [1]Wang;Yahan [1]Meng;Ke [1]Li;Touqeer [1]Ahmad;Na [1]Chen;Yan [1]Xu;Jifei [1]Sun;Mingyan [1]Chuai;Xinhua [1]Zheng;Yuan [1]Yuan;Chunyue [1]Shen;Ziqi [1]Zhang;Wei [1]Chen

机构地区：[1]Department of Applied Chemistry,School of Chemistry and Materials Science,Hefei National Research Center for Physical Sciences at the Microscale,University of Science and Technology of China,Hefei,Anhui,230026,China

出　　处：《eScience》索引2022年第2卷第5期,共9页

基　　金：the startup funding support from the Fundamental Research Funds for the Central Universities(Grant KY2060000150,WK2060000040);the support from USTC Center for Micro and Nanoscale Research and Fabrication and NEWARE;The authors also acknowledge the advanced computing resources provided by the Supercomputing Center of the USTC. 摘　　要：Aqueous rechargeable zinc metal batteries display high theoretical capacity along with economical effectiveness,environmental benignity and high safety.However,dendritic growth and chemical corrosion at the Zn anodes limit their widespread applications.Here,we construct a Zn/Bi electrode via in-situ growth of a Bi-based energizer upon Zn metal surface using a replacement reaction.Experimental and theoretical calculations reveal that the Bi-based energizer composed of metallic Bi and ZnBi alloy contributes to Zn plating/stripping due to strong adsorption energy and fast ion transport rates.The resultant Zn/Bi electrode not only circumvents Zn dendrite growth but also improves Zn anode anti-corrosion performance.Specifically,the corrosion current of the Zn/Bi electrode is reduced by 90%compared to bare Zn.Impressively,an ultra-low overpotential of 12mV and stable cycling for 4000h are achieved in a Zn/Bi symmetric cell.A Zn–Cu/Bi asymmetric cell displays a cycle life of 1000 cycles,with an average Coulombic efficiency as high as 99.6%.In addition,an assembled Zn/Bi-activated carbon hybrid capacitor exhibits a stable life of more than 50,000 cycles,an energy density of 64Wh kg−1,and a power density of 7kWkg−1.The capacity retention rate of a Zn/Bi–MnO_(2)full cell is improved by over 150%compared to a Zn–MnO_(2)cell without the Bi-based energizer.Our findings open a new arena for the industrialization of Zn metal batteries for large-scale energy storage applications. 关键词：Aqueous Zn anode ANTI-CORROSION Replacement reaction Dendrite-free Bismuth-based energizer

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Toward dendrite-free and anti-corrosion Zn anodes by regulating a bismuth-based energizer

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