阳极
法拉第效率
锌
异质结
材料科学
图层(电子)
金属
多金属氧酸盐
化学工程
无机化学
水溶液
电镀(地质)
电极
化学
纳米技术
冶金
光电子学
有机化学
催化作用
物理化学
工程类
地球物理学
地质学
作者
Fengxue Duan,Shirui Jin,Yingjie Cheng,Fan Yang,Ming-Feng Wei,Meiling Wang,Xu Zhang,Yongjian Yu,Xiuxiu Yin,Kangning Zhao,Yingjin Wei,Lixin Wu,Yizhan Wang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2022-12-23
卷期号:23 (1): 42-50
被引量:18
标识
DOI:10.1021/acs.nanolett.2c03277
摘要
Dendrite growth and side reactions of Zn metal anodes remain unresolved obstacles for practical application of aqueous Zn ion batteries. Herein, a two-dimensional (2D) organic–inorganic heterostructure with controlled thickness was constructed as a protective layer for a Zn metal anode. The reduction of uniformly distributed polyoxometalate in the layer causes a negative charge density gradient, which can accelerate zinc ion transfer, homogenize zinc deposition, and shield sulfates at the electrode interface, while the exposed hydrophobic alkyl chain of the layer can isolate the direct contact of water with the Zn anode. As a result of the synergetic effect, this 2D organic–inorganic heterostructure enables high Zn plating/stripping reversibility, with high average Coulombic efficiencies of 99.97% for 3700 cycles at 2 mA cm–2. Under high Zn utilization conditions, a high areal-capacity full cell with hundreds of cycles was demonstrated.
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