阳极
电解质
锂(药物)
材料科学
金属锂
相间
电池(电)
化学工程
纳米技术
锂离子电池
电极
复合材料
化学
热力学
功率(物理)
工程类
生物
医学
物理
内分泌学
物理化学
遗传学
作者
Josefine McBrayer,Christopher A. Apblett,Katharine L. Harrison,Kyle Fenton,Shelley D. Minteer
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2021-07-27
卷期号:32 (50): 502005-502005
被引量:45
标识
DOI:10.1088/1361-6528/ac17fe
摘要
Abstract A stable solid electrolyte interphase (SEI) layer is key to high performing lithium ion and lithium metal batteries for metrics such as calendar and cycle life. The SEI must be mechanically robust to withstand large volumetric changes in anode materials such as lithium and silicon, so understanding the mechanical properties and behavior of the SEI is essential for the rational design of artificial SEI and anode form factors. The mechanical properties and mechanical failure of the SEI are challenging to study, because the SEI is thin at only ~10–200 nm thick and is air sensitive. Furthermore, the SEI changes as a function of electrode material, electrolyte and additives, temperature, potential, and formation protocols. A variety of in situ and ex situ techniques have been used to study the mechanics of the SEI on a variety of lithium ion battery anode candidates; however, there has not been a succinct review of the findings thus far. Because of the difficulty of isolating the true SEI and its mechanical properties, there have been a limited number of studies that can fully de-convolute the SEI from the anode it forms on. A review of past research will be helpful for culminating current knowledge and helping to inspire new innovations to better quantify and understand the mechanical behavior of the SEI. This review will summarize the different experimental and theoretical techniques used to study the mechanics of SEI on common lithium battery anodes and their strengths and weaknesses.
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