阳极
材料科学
锌
吸附
化学工程
水溶液
枝晶(数学)
金属
电化学
无机化学
电偶阳极
电极
化学
冶金
有机化学
阴极保护
物理化学
几何学
数学
工程类
作者
Huaming Yu,Yuejiao Chen,Weifeng Wei,Xiaobo Ji,Libao Chen
出处
期刊:ACS Nano
[American Chemical Society]
日期:2022-05-31
卷期号:16 (6): 9736-9747
被引量:99
标识
DOI:10.1021/acsnano.2c03398
摘要
Aqueous Zn metal batteries suffer from rapid cycling deterioration due to the severe water corrosion and dendrite growth on Zn anodes. Herein, a highly antiwater Znx-diethylenetriaminepenta(methylene-phosphonic acid) interface layer with good zinc affinity and special nanoscaled 3D granular structure is designed on Zn metal to address these problems. Experimental results combined with theoretical analysis and COMSOL simulations reveal that the hydrophobic groups in such Zn-based organic complex are the decisive factor in preventing H2O from damaging Zn anode surface. The massive Zn2+ attractive sites formed by interaction of methylene-phosphonic acid groups and Zn cause ion channel for fast zinc-ion adsorption and migration. And the developed nano granular architecture on the surface induces redistributed Zn2+ ion flux to realize homogenization with smooth and compact surface deposition. Under the synergism, such modified anodes exhibit long cycling lifespan over 1300 h with a relatively low polarization voltage at 5 mA cm-2. Also, the assembled full cells (including Zn//V2O5 and Zn//MnO2 cell) based on this anode are also demonstrated. The work provides a simple, low cost, and efficient pathway by combining the two concepts of structural design and constructing protective layers on the surface to prepare high-performance Zn anodes toward prospering aqueous zinc-metal batteries.
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