阳极
纳米片
水溶液
材料科学
化学工程
钛
枝晶(数学)
纳米技术
金属有机骨架
锌
电池(电)
电偶阳极
无机化学
阴极保护
化学
电极
有机化学
冶金
几何学
数学
物理化学
吸附
工程类
功率(物理)
物理
量子力学
作者
Chao Wang,Qihong Xie,Taolian Guo,Min Fang,Wei Mao,Yuchen Zhang,Haobo Wang,Xinxi Ma,Yutong Wu,Shuang Li,Jie Han
出处
期刊:Nano Letters
[American Chemical Society]
日期:2023-11-20
卷期号:23 (23): 10930-10938
被引量:8
标识
DOI:10.1021/acs.nanolett.3c03161
摘要
Aqueous zinc-ion batteries have attracted a continually increasing level of interest for large-scale energy storage because they are highly safe and have high energy density and abundant reserves. However, Zn anodes face significant challenges such as severe dendrite growth and hydrogen evolution reaction (HER). We here propose an efficient Zn2+ sieve strategy for modulating the anode chemistry using two-dimensional NH2-MIL-125 (Ti) metal-organic framework (MOF) nanosheets. Theoretical investigations reveal the crucial role of the Ti MOF in regulating Zn2+ solvation structures for fast diffusion and uniform deposition and decreasing HER reactivity. The structure of the nanosheets enables abundant accessible desolvation sites and shortened ionic pathways. As a result, the MOF nanosheet-protected Zn anode exhibited greatly improved cycling stability in both symmetric cells and full cells. Operando optical monitoring and postmortem analysis revealed effective suppression of dendrite growth and HER by Ti MOF nanosheets. This anti-HER MOF-enabled Zn2+ sieve strategy provides a viable Zn anode and provides new insights for optimizing aqueous batteries.
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