色谱质谱技术在锂离子电池研究中的应用

Application of chromatography-mass spectrometry in study of lithium ion battery

综述了色谱质谱技术在锂离子电池领域的研究进展。锂离子电池基于其绿色、性能优良等优点已广泛应用在电动汽车、储能、手机等方面。作为电动汽车的核心零部件之一,锂电池的性能很大程度上决定了电动汽车的技术水平,锂离子电池的电性能、安全性能、稳定性等直接影响了电动汽车的运行状态。为进一步提高锂离子电池的性能,充放电过程中的产物生成分析和机理分析是关键,而产物的准确检测是保障分析结果准确性的关键因素之一。本文从三个方面介绍了色谱和质谱技术在锂电池的应用,包括:①利用TOF-SIMS和LCIT-TOF-MS进行固体电解质中间相(即SEI膜)成分和电解液老化产物分析;②通过TOF-SIMS等联用技术对不同形态石墨中SEI膜成分和形态分析;③通过GC-MS技术研究了锂电池滥用条件下的产气情况和不同材料体系产气组分的差异。

The research progress of chromatography-mass Spectrometry technology in the field of lithium-ion batteries is reviewed.Lithium-ion batteries have been widely used in electric vehicles,energy storage,mobile phones,etc.based on their green,excellent performance and other advantages.As one of the core components of electric vehicles,the performance of lithium batteries largely determines the technical level of electric vehicles.The electrical performance,safety performance,and stability of lithium-ion batteries directly affect the operating state of electric vehicles.In order to further improve the performance of lithium-ion batteries,product generation analysis and mechanism analysis will be of a great importance during charging and discharging.And accurate product detection is one of the key factors to ensure the accuracy of the analysis results.In this article,the progress of lithium metal anode passivation technology was introduced from the following three aspects,including:①the solid electrolyte mesophase(ie SEI membrane)composition and electrolyte degradation analysis using TOF-SIMS and LC-IT-TOF-MS;②the SEI membrane composition and morphology of different forms of graphite using TOF-SIMS and other combined technology;③the gas production under the conditions of abuse of lithium batteries and gas evolution behaviors for several cathode materials in lithium-ion batteries using GC-MS technology.