Developing a “Water‐Defendable” and “Dendrite‐Free” Lithium‐Metal Anode Using a Simple and Promising GeCl4 Pretreatment Method,Advanced Materials

当前位置： X-MOL 学术 › Adv. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

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, GeO_x, 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

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南