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 Zn2+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||MnO2 batteries.Remarkably,the Zn@MCFs||α-MnO2 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.

Hangjun Ying;Pengfei Huang;Zhao Zhang;Shunlong Zhang;Qizhen Han;Zhihao Zhang;Jianli Wang;Wei-Qiang Han

School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,People's Republic of China

纳微快报（英文）

[1]Hangjun Ying;Pengfei Huang;Zhao Zhang;Shunlong Zhang;Qizhen Han;Zhihao Zhang;Jianli Wang;Wei-Qiang Han-.Freestanding and Flexible Interfacial Layer Enables Bottom-Up Zn Deposition Toward Dendrite-Free Aqueous Zn-Ion Batteries)[J].纳微快报（英文）,2022(11):157-171

multicapsular,uniformize,Zn2+flux,exhilarating

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