材料科学
法拉第效率
阳极
电解质
锂(药物)
过电位
成核
化学工程
枝晶(数学)
阴极
电化学
电镀(地质)
扩散
图层(电子)
钝化
电极
复合材料
化学
有机化学
热力学
物理化学
内分泌学
工程类
地质学
物理
几何学
医学
数学
地球物理学
作者
Jian Wang,Huimin Hu,Shaorong Duan,Qingbo Xiao,Jing Zhang,Haitao Liu,Qi Kang,Lujie Jia,Jin Yang,Wenlong Xu,Huifang Fei,Shuang Cheng,Linge Li,Meinan Liu,Hongzhen Lin,Yuegang Zhang
标识
DOI:10.1002/adfm.202110468
摘要
Abstract Spatially random lithium nucleation and sluggish lithium diffusion across the electrode/electrolyte interface lead to uncontrollable lithium deposition and the growth of lithium dendrite on metallic lithium surface, causing severe safety problems. Herein, a functional rapid‐ion‐diffusion alloy layer on the metallic lithium surface (RIDAL‐Li) is designed through a simple chemical reduction reaction. Such a layer efficiently reduces energy barriers for lithium transport and thus significantly homogenizes the lithium atom flux for lateral deposition, which are confirmed by electrochemical tests, theoretical simulations, and spectroscopic analysis. Furthermore, the as‐prepared RIDAL layer also displays a much higher corrosion resistance to moisture and oxygen. As a result, in ether‐based and carbonate‐based electrolytes, the pretreated RIDAL‐Li anode can achieve a long stripping/plating lifespan of 900 h and a high Coulombic efficiency of 99% without dendrite growth. Even after being exposed to the ambient environment with relative humidity of 51% for 60 min, the RIDAL‐Li can survive for stripping/plating 400 h and exhibit a low overpotential of 18 mV, displaying the superiority for ambient atmosphere battery assembly. Matched with LiFePO 4 or sulfur cathode, the full cells exhibit remarkably improved stability and capacity retention, showing its suitability for applications in lithium metal batteries.
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