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Determining the Composition of Carbonate Solvent Systems Used in Lithium-Ion Batteries without Salt Removal

Authors :
Mohammad Parhizi
Louis Edwards Caceres-Martinez
Brent A. Modereger
Hilkka I. Kenttämaa
Gozdem Kilaz
Jason K. Ostanek
Source :
Energies; Volume 15; Issue 8; Pages: 2805
Publication Year :
2022
Publisher :
MDPI AG, 2022.

Abstract

In this work, two methods were investigated for determining the composition of carbonate solvent systems used in lithium-ion (Li-ion) battery electrolytes. One method was based on comprehensive two-dimensional gas chromatography with electron ionization time-of-flight mass spectrometry (GC×GC/EI TOF MS), which often enables unknown compound identification by their electron ionization (EI) mass spectra. The other method was based on comprehensive two-dimensional gas chromatography with flame ionization detection (GC×GC/FID). Both methods were used to determine the concentrations of six different commonly used carbonates in Li-ion battery electrolytes (i.e., ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), diethyl carbonate (DEC), ethyl methyl carbonate (EMC), and vinylene carbonate (VC) in model compound mixtures (MCMs), single-blind samples (SBS), and a commercially obtained electrolyte solution (COES). Both methods were found to be precise (uncertainty < 5%), accurate (error < 5%), and sensitive (limit of detection

Details

ISSN :
19961073
Volume :
15
Database :
OpenAIRE
Journal :
Energies
Accession number :
edsair.doi.dedup.....74fb3d228a4874d1328a0d3192660a2f
Full Text :
https://doi.org/10.3390/en15082805