In Situ Growth of 2D Metal–Organic Framework Ion Sieve Interphase for Reversible Zinc Anodes  

作　　者：Jing Sun Qinping Jian Bin Liu Pengzhu Lin Tianshou Zhao 

机构地区：[1]Department of Mechanical and Aerospace Engineering,The Hong Kong University of Science and Technology,Clear Water Bay,Kowloon,Hong Kong SAR,China [2]Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen 518055,China

出　　处：《Energy & Environmental Materials》2024年第6期158-166,共9页能源与环境材料（英文）

基　　金：supported by the grants from the Research Grants Council of the Hong Kong Special Administrative Region,China(Project No.C5031-20);the Guangdong Major Project of Basic and Applied Basic Research(2023B0303000002).

摘　　要：Zinc metal anodes are gaining popularity in aqueous electrochemical energy storage systems for their high safety,cost-effectiveness,and high capacity.However,the service life of zinc metal anodes is severely constrained by critical challenges,including dendrites,water-induced hydrogen evolution,and passivation.In this study,a protective two-dimensional metal–organic framework interphase is in situ constructed on the zinc anode surface with a novel gel vapor deposition method.The ultrathin interphase layer(~1μm)is made of layer-stacking 2D nanosheets with angstrom-level pores of around 2.1Å,which serves as an ion sieve to reject large solvent–ion pairs while homogenizes the transport of partially desolvated zinc ions,contributing to a uniform and highly reversible zinc deposition.With the shielding of the interphase layer,an ultra-stable zinc plating/stripping is achieved in symmetric cells with cycling over 1000 h at 0.5 mA cm−2 and~700 h at 1 mA cm^(−2),far exceeding that of the bare zinc anodes(250 and 70 h).Furthermore,as a proof-of-concept demonstration,the full cell paired with MnO_(2) cathode demonstrates improved rate performances and stable cycling(1200 cycles at 1 A g−1).This work provides fresh insights into interphase design to promote the performance of zinc metal anodes.

关 键 词：2D MOF DESOLVATION INTERPHASE ion sieve zinc anode 

分 类 号：TM91[电气工程—电力电子与电力传动]