Lithium Ion Secondary Battery
Analysis of Electrolytic Solution Before and After Life Test

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The electrolytic solution of the lithium ion secondary battery declines in performance after long-time use. With respect to the electrolytic solution before and after life test, it has become possible to determine the structure of trace product materials by performing a combination of multivariate analysis by liquid chromatography/time-of-flight mass spectrometry (LC/TOF-MS) and structural analysis by liquid chromatography tandem mass spectrometry (LC/MS/MS). This has made it possible to obtain data to be used for studying a reaction inhibition formula.

Multivariate analysis of an electrolytic solution by liquid chromatography/time-of-flight mass spectrometry (LC/TOF-MS)

Total ion current chromatogram (TICC) obtained from analysis of analysis the base electrolytic solution before and after tests Results of multivariate analysis →It is difficult to visually identify all product materials. →It is possible to make all product materials, including a trace amount of components, visible.

Structural analysis of an electrolytic solution by liquid chromatography tandem mass spectrometry (LC/MS/MS)

Results of structural analysis by LC/MS/MS Product ion Ion chromatogram processing revealed that the component extracted by multivariate analysis was a particular component that appeared after life test. The structure of the product materials was estimated by performing an estimate of the elementary composition by accurate mass and fragment analysis.

Search Number 2008

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