纳米片
无定形固体
箔法
材料科学
介孔材料
阳极
沸石咪唑盐骨架
电解质
复合数
枝晶(数学)
纳米技术
化学工程
复合材料
金属有机骨架
催化作用
吸附
结晶学
电极
化学
物理化学
工程类
生物化学
几何学
数学
有机化学
作者
Tuo Xin,Yiran Wang,Qiyong Xu,Jiaxiang Shang,Xiangcheng Yuan,Weixing Song,Jinzhang Liu
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2022-02-11
卷期号:5 (2): 2290-2299
被引量:11
标识
DOI:10.1021/acsaem.1c03790
摘要
Rechargeable aqueous zinc-ion batteries (ZIBs) hold great promise for future applications in large-scale energy storage systems. However, the rampant dendrite growth and undesired hydrogen gas evolution over the Zn anode are key issues that make the current ZIB technology immature. Herein, we demonstrate the use of a zeolitic imidazolate framework (ZIF)-derived composite coating on Zn foil for simultaneously suppressing the dendrite growth and H2 evolution when operated in ZnSO4 electrolytes. The polyhedral ZIF-8 granules are converted into mesoporous N-doped carbon (NC) decorated with ZnS nanoparticles, and this ZnS/NC composite is coated onto Zn foil. For comparison, bare Zn anodes and Zn foils coated with other ZIF-derived materials including ZnS nanocrystals and NC frameworks are also used to make half or full cells. The Zn@ZnS/NC anode shows the best performance in terms of superb cycling stability, suppressed dendrite growth, and reduced H2 evolution. At the interface between ZnS/NC coating and Zn foil, confined parasitic reactions result in a layer of an amorphous ZnO nanosheet network, which has a positive effect on reducing water activity. The role of this amorphous ZnO byproduct in reducing H2 evolution is discussed in detail. This work sheds light on a strategy for making practical ZIBs.
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