Abstract
Differential electrochemical mass spectrometry (DEMS) was used to study the electrochemical decomposition of organic carbonate electrolyte solutions at practical lithium metal oxide composite electrodes used in lithium-ion batteries. For propylene carbonate (PC), CO<sub>2</sub> evolution was detected at LiNiO<sub>2</sub>, LiCoO<sub>2</sub>, and LiMn<sub>2</sub>O<sub>4</sub> composite electrodes. The starting point of gas evolution was 4.2 V vs. Li/Li<sup>+</sup> at LiNiO<sub>2</sub>, whereas at LiCoO<sub>2</sub> and LiMn<sub>2</sub>O<sub>4</sub>, CO<sub>2</sub> evolution was observed only above 4.8 V vs. Li/Li<sup>+</sup>. In addition, various other volatile electrolyte decomposition products of PC were detected when using LiCoO<sub>2</sub>, LiMn<sub>2</sub>O<sub>4</sub>, and carbon black electrodes. In ethylene carbonate/dimethylcarbonate, CO<sub>2</sub> evolution was detected only at LiNiO<sub>2</sub> electrodes, again starting at about 4.2 V vs. Li/Li<sup>+</sup>.
Keywords
Ethylene carbonateElectrochemistryPropylene carbonateElectrolyteChemistryLithium (medication)Inorganic chemistryCarbon blackElectrodeOxideEthylene oxideCarbonateSolventOrganic chemistryPhysical chemistry
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Publication Info
- Year
- 1999
- Type
- article
- Volume
- 146
- Issue
- 5
- Pages
- 1702-1706
- Citations
- 162
- Access
- Closed
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Cite This
Roman Imhof,
Petr Novák
(1999).
Oxidative Electrolyte Solvent Degradation in Lithium‐Ion Batteries: An In Situ Differential Electrochemical Mass Spectrometry Investigation.
Journal of The Electrochemical Society
, 146
(5)
, 1702-1706.
https://doi.org/10.1149/1.1391829
Identifiers
- DOI
- 10.1149/1.1391829