材料科学
杂原子
阳极
法拉第效率
枝晶(数学)
电偶阳极
兴奋剂
化学工程
电解质
锌
金属
离子
电化学
纳米技术
水溶液
无机化学
电极
光电子学
冶金
有机化学
阴极保护
化学
物理化学
工程类
数学
几何学
戒指(化学)
作者
Zenghua Liu,Junfeng Ren,Fanghui Wang,Xiaobin Liu,Qian Zhang,Jie Liu,Payam Kaghazchi,Dingxuan Ma,Zhenzhen Chi,Lei Wang
标识
DOI:10.1021/acsami.1c06002
摘要
Aqueous Zn-ion batteries (AZBs) have been considered as one of the most promising large-scale energy storage systems, owing to the advantages of raw material abundance, low cost, and eco-friendliness. However, the severe growth of Zn dendrites leads to poor stability and low Coulombic efficiency of AZBs. Herein, to effectively inhibit the growth of Zn dendrites, a new strategy has been proposed, i.e., tuning the surface energy of the Zn anode. This strategy can be achieved by in situ doping of Sn heteroatoms in the lattice of metallic Zn via codeposition of Sn and Zn with a small amount of the SnCl2 electrolyte additive. Density functional theory calculations have suggested that Sn heteroatom doping can sharply decrease the surface free energy of the Zn anode. As a consequence, driven by the locally strong electric field, metallic Sn tends to deposit at the tips of the Zn anode, thus decreases the surface energy and growth of Zn at the tips, resulting in a dendrite-free Zn anode. The positive effect of the SnCl2 additive has been demonstrated in both the Zn∥Zn symmetric battery and the Zn/LFP and Zn/HATN full cell. This novel strategy can light a new way to suppress Zn dendrites for long life span Zn-ion batteries.
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