合金
阳极
锂(药物)
材料科学
电解质
沉积(地质)
电化学
基质(水族馆)
箔法
化学工程
扫描电子显微镜
薄膜
纳米技术
电极
冶金
复合材料
化学
医学
古生物学
物理化学
沉积物
工程类
生物
内分泌学
海洋学
地质学
作者
Nicolas Delaporte,Alexis Péréa,Steve Collin-Martin,Mireille Léonard,Julie Matton,Vincent Gariépy,Hendrix Demers,Daniel Clément,Etienne Rivard,Ashok K. Vijh
标识
DOI:10.1002/batt.202200245
摘要
Abstract All‐solid‐state batteries (ASSB) require stable and safe lithium (Li) metal anode, which needs surface preparation to increase lithium diffusion and impede the formation of dendrites. In this work, the formation of a thin LiZn layer on lithium metal using sputter deposition is reported. This method was selected due to the absence of solvents and by‐products generated during the modification, for its rapidity and because the formation of the alloy is performed in a clean and controlled atmosphere. Zinc has been chosen for its low cost and high Li + ion diffusion coefficient of the corresponding LiZn alloy that is 1000 times higher than Li. Different parameters for the Zn deposition were investigated such as the distance between the Zn target and Li foil, the effect of substrate tilt and the direct current applied to the target. Electrochemical performance of LiFePO 4 /solid polymer electrolyte/Li ASSB demonstrated the superiority of the LiZn anodes and the clear influence of deposition parameters on the durability and performance at high C‐rates. Scanning electron microscopy images of the cross‐sectional view of LFP/SPE/Li stackings extracted from pouch cells after cycling showed an evident migration of Zn into the bulk Li metal anode as well as the formation of AlZn nanoparticles.
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