Abrasive Blasting of Lithium Metal Surfaces Yields Clean and 3D-Structured Lithium Metal Anodes with Superior Properties,Energy Technology

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Abrasive Blasting of Lithium Metal Surfaces Yields Clean and 3D-Structured Lithium Metal Anodes with Superior Properties
Energy Technology ( IF 3.6 ) Pub Date : 2021-09-08 , DOI: 10.1002/ente.202100455
Andreas Wolf ₁ , Henning Lorrmann ₁ , Andreas Flegler ₁ , Andreas Wolf _{1,

2} , Abdelbast Guerﬁ ₃ , Karl Mandel _{1,

2} , Guinevere A. Giffin ₁

Affiliation

Avoiding harmful passivation of the lithium metal surface during its implementation as an anode material is a challenge to its use in rechargeable lithium metal batteries. It is critical to control the chemical composition and the morphology of the native passivation layer and to avoid contamination by lubricants or other substances involved in the processing. Herein, abrasive blasting is used as a physical method to achieve clean and 3D-structured lithium metal electrodes. The careful choice of the abrasive agent and the blasting parameters results in well-controlled surface properties. The blasted lithium electrodes exhibit significantly lower overvoltages with values as low as 10 mV at 0.1 mA cm⁻². Electrochemical impedance spectroscopy shows that blasted lithium has interface resistances that are up to five times smaller than those of untreated lithium. The effectiveness of blasting as a cleaning method is clear even in the case of thicker and highly resistive passivation layers occurring after exposure to ambient air.

中文翻译：

锂金属表面的喷砂产生具有卓越性能的清洁和 3D 结构的锂金属阳极

在其作为负极材料的实施过程中避免锂金属表面的有害钝化是其在可充电锂金属电池中使用的一个挑战。控制天然钝化层的化学成分和形态并避免润滑剂或加工中涉及的其他物质的污染至关重要。在此，喷砂作为一种物理方法来实现清洁的 3D 结构锂金属电极。仔细选择研磨剂和喷砂参数可实现良好控制的表面特性。喷砂锂电极表现出显着较低的过电压，在 0.1 mA cm ^{-2 时的}值低至 10 mV. 电化学阻抗谱显示，爆破锂的界面电阻比未经处理的锂小五倍。即使在暴露于环境空气后出现更厚和高电阻钝化层的情况下，喷砂作为清洁方法的有效性也是显而易见的。

更新日期：2021-11-04

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