Lithiophilic Zn Sites in Porous CuZn Alloy Induced Uniform Li Nucleation and Dendrite-free Li Metal Deposition,Nano Letters

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Lithiophilic Zn Sites in Porous CuZn Alloy Induced Uniform Li Nucleation and Dendrite-free Li Metal Deposition
Nano Letters ( IF 9.6 ) Pub Date : 2020-03-09 , DOI: 10.1021/acs.nanolett.0c00352
Shang-Sen Chi _{1,

2} , Qingrong Wang ₁ , Bing Han ₁ , Chao Luo ₁ , Yidong Jiang ₁ , Jun Wang ₁ , Chaoyang Wang ₃ , Yan Yu _{2,

4,

5} , Yonghong Deng ₁

Affiliation

Three-dimensional (3D) lithiophilic host is one of the most effective ways to regulate the Li dendrites and volume change in working Li metal anode. The state-of-the-art 3D lithiophilic hosts are facing one main challenge in that the lithiophilic layer would melt or fall off in high-temperature environment when using the thermal infusion method. Herein, a 3D porous CuZn alloy host containing anchored lithiophilic Zn sites is employed to prestore Li using the thermal infusion strategy, and a 3D composite Li is thus fabricated. Benefiting from the lithiophilic Zn sites with a strong adsorption capacity with Li, which is based on the analyses of the nucleation overpotential, binding energy calculation, and the operando optical observation of Li plating/stripping behaviors, facile uniform Li nucleation and dendrite-free Li deposition could be achieved in the interior of the 3D porous CuZn alloy host and the 3D composite Li shows remarkable enhancement in electrochemical performance.

中文翻译：

多孔CuZn合金中的亲硫锌位点导致均匀的Li成核和无枝晶Li金属沉积

三维（3D）亲硫基质是调节锂枝晶和工作锂金属阳极体积变化的最有效方法之一。最新的3D亲脂宿主面临一个主要挑战，因为当使用热灌注方法时，亲脂层会在高温环境中融化或脱落。在本文中，使用热注入策略，使用包含锚定的疏硫锌位点的3D多孔CuZn合金主体来预存储Li，从而制造3D复合Li。得益于对Li具有强吸附能力的亲硫性Zn位点，该位点基于对成核超电势的分析，结合能的计算以及对Li镀层/剥离行为的操作光学观察，

更新日期：2020-04-24

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