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Freestanding and Flexible Interfacial Layer Enables Bottom-Up Zn Deposition Toward Dendrite-Free Aqueous Zn-Ion Batteries

查看全文 作　　者：Hangjun [1]Ying;Pengfei [1]Huang;Zhao [1]Zhang;Shunlong [1]Zhang;Qizhen [1]Han;Zhihao [1]Zhang;Jianli [1]Wang;Wei-Qiang [1]Han 高影响力作者 机构地区：[1]School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,People’s Republic of China高影响力机构 出　　处：《Nano-Micro Letters》索引2022年第14卷第11期,共15页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(51901206);“the Fundamental Research Funds for the Central Universities”(2021QNA4003). 摘　　要：Aqueous rechargeable zinc ion batteries are regarded as a competitive alternative to lithium-ion batteries because of their distinct advantages of high security,high energy density,low cost,and environmental friendliness.However,deep-seated problems including Zn dendrite and adverse side reactions severely impede the practical application.In this work,we proposed a freestanding Zn-electrolyte interfacial layer composed of multicapsular carbon fibers(MCFs)to regulate the plating/stripping behavior of Zn anodes.The versatile MCFs protective layer can uniformize the electric field and Zn^(2+)flux,meanwhile,reduce the deposition overpotentials,leading to high-quality and rapid Zn deposition kinetics.Furthermore,the bottom-up and uniform deposition of Zn on the Zn-MCFs interface endows long-term and high-capacity plating.Accordingly,the Zn@MCFs symmetric batteries can keep working up to 1500 h with 5 mAh cm^(−2).The feasibility of the MCFs interfacial layer is also convinced in Zn@MCFs||MnO_(2) batteries.Remarkably,the Zn@MCFs||α-MnO_(2)batteries deliver a high specific capacity of 236.1 mAh g^(−1)at 1 A g^(−1)with excellent stability,and maintain an exhilarating energy density of 154.3 Wh kg^(−1) at 33%depth of discharge in pouch batteries. 关 键 词：Aqueous zinc-ion battery Flexible interfacial layer Dendrite inhibition Bottom-up deposition Moderate zincophilicity
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