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Developing a “Water‐Defendable” and “Dendrite‐Free” Lithium‐Metal Anode Using a Simple and Promising GeCl4 Pretreatment Method
Advanced Materials ( IF 27.4 ) Pub Date : 2018-07-30 , DOI: 10.1002/adma.201705711
Kaiming Liao 1, 2, 3 , Shichao Wu 3 , Xiaowei Mu 1 , Qian Lu 2 , Min Han 1 , Ping He 1 , Zongping Shao 2 , Haoshen Zhou 1, 3
Affiliation  

Lithium metal is an ultimate anode in “next‐generation” rechargeable batteries, such as Li–sulfur batteries and Li–air (Li–O2) batteries. However, uncontrollable dendritic Li growth and water attack have prevented its practical applications, especially for open‐system Li–O2 batteries. Here, it is reported that the issues can be addressed via the facile process of immersing the Li metal in organic GeCl4–THF steam for several minutes before battery assembly. This creates a 1.5 µm thick protection layer composed of Ge, GeOx, Li2CO3, LiOH, LiCl, and Li2O on Li surface that allows stable cycling of Li electrodes both in Li‐symmetrical cells and Li–O2 cells, especially in “moist” electrolytes (with 1000–10 000 ppm H2O) and humid O2 atmosphere (relative humidity (RH) of 45%). This work illustrates a simple and effective way for the unfettered development of Li‐metal‐based batteries.

中文翻译:


使用简单且有前景的 GeCl4 预处理方法开发“防水”和“无枝晶”的锂金属阳极



锂金属是“下一代”可充电电池的最终阳极,例如锂硫电池和锂空气(Li-O 2 )电池。然而,不可控的枝晶锂生长和水侵蚀阻碍了其实际应用,特别是对于开放系统Li-O 2电池。据报道,这些问题可以通过在电池组装前将锂金属浸入有机 GeCl 4 -THF 蒸汽中几分钟的简单过程来解决。这在 Li 表面形成了由 Ge、GeO x 、Li 2 CO 3 、LiOH、LiCl 和 Li 2 O 组成的 1.5 µm 厚保护层,允许 Li 电极在 Li 对称电池和 Li-O 2电池中稳定循环,特别是在“潮湿”电解质(含有 1000–10 000 ppm H 2 O)和潮湿的 O 2气氛(相对湿度 (RH) 为 45%)中。这项工作展示了一种不受限制地开发锂金属电池的简单有效的方法。
更新日期:2018-07-30
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