Identification and formation mechanism of individual degradation products in lithium-ion batteries studied by liquid chromatography/electrospray ionization mass spectrometry and atmospheric solid analysis probe mass spectrometry

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Title:	Identification and formation mechanism of individual degradation products in lithium-ion batteries studied by liquid chromatography/electrospray ionization mass spectrometry and atmospheric solid analysis probe mass spectrometry
Authors:	劉奕宏;Takeda, Sahori;Morimura, Wataru;Liu, Yi-Hung;Sakai, Tetsuo;Saito, Yuria
Contributors:	工學院化學工程與材料工程學系
Keywords:	Atmospherics;Degradation;Electrodes;Electrolytes;Formations;Ionization;Liquid chromatography;Lithium-ion batteries;Mass spectrometry
Date:	2016-08-15
Issue Date:	2026-04-21 14:53:23 (UTC+8)
Publisher:	John Wiley and Sons Ltd;England: Blackwell Publishing Ltd
Abstract:	摘要： RationaleImprovement of lithium ion batteries (LIBs) in terms of performance and robustness requires good understanding of the reaction processes. The analysis of the individual degradation products in LIB electrolytes and on the surface of the electrodes provides vital information in this regard. In this study, mass spectrometric analytical methods were utilized for the identification of the individual degradation products.MethodsThe degradation products in the electrolytes recovered from cycle‐tested cells were separated by liquid chromatography (LC) and their mass spectrometric analysis was conducted by electrospray ionization mass spectrometry (ESI‐MS). For identification of degradation products on the surface of electrodes, atmospheric solid analysis probe (ASAP)‐MS analysis was conducted by time‐of‐flight mass spectrometry with an ASAP probe and an atmospheric pressure chemical ionization source.ResultsThe degradation products in the electrolytes, namely carbonate oligomers and organophosphates, were identified simultaneously by LC/ESI‐MS. Their formation mechanisms were estimated, which explain their different compositions at different temperatures. One degradation product was found on the anode surface by ASAP‐MS, and its formation mechanism was explained similarly to those in the electrolyte.ConclusionsThe results suggest that the electrolyte degradation is correlated with the formation of a solid electrolyte interphase, which is an important factor in the performance of LIBs. We expect that further investigation of the degradation products by LC/ESI‐MS and ASAP‐MS will be helpful for studying their degradation processes in LIBs. Copyright © 2016 John Wiley & Sons, Ltd. 其他題名： Rapid Commun. Mass Spectrom 出版者： England: Blackwell Publishing Ltd 出版日期： 2016-08-15 出處： Rapid Communications in Mass Spectrometry, 2016-08, Vol.30 (15), p.1754-1762 版權： Copyright © 2016 John Wiley & Sons, Ltd. 識別號： ISSN: 0951-4198 識別號： EISSN: 1097-0231 識別號： DOI: 10.1002/rcm.7652 識別號： PMID: 27426451
Appears in Collections:	[Department of Chemical and Materials Engineering] journal & Dissertation

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