锂(药物)
电解质
电极
化学
离子
分析化学(期刊)
相间
气相色谱法
气体消耗
环境化学
色谱法
工艺工程
有机化学
物理化学
生物
工程类
内分泌学
医学
遗传学
作者
L. D. Ellis,J. P. Allen,Lauren Thompson,Jessie Harlow,W J D Stone,Ian G. Hill,J. R. Dahn
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2017-01-01
卷期号:164 (14): A3518-A3528
被引量:79
摘要
Lithium-ion cells produce a considerable amount of gas in their first cycle. If the gases are not removed in a degassing step, most are consumed by the cell over time. This phenomenon has never been investigated explicitly in the literature. In this paper, the evolution and subsequent consumption of gas in typical lithium-ion cells are measured by Archimedes' principle and gas chromatography. It is found that all evolved gases are subsequently consumed to some degree, except for saturated hydrocarbons. The consumption of gas occurs predominantly at the negative electrode, where the gases are reduced to form part of the solid-electrolyte interphase (SEI). Changes to the negative electrode SEI upon gas consumption are investigated using X-ray photoelectron spectroscopy. The effect of gas consumption on cell performance is studied with ultra-high precision charging and high voltage storage experiments. It is found that gas consumption does not result in measurable adverse effects to cell performance.
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