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The Effects of Gas Saturation of Electrolytes on the Performance and Durability of Lithium‐Ion Batteries

Bläubaum, Lars 1; Röse, Philipp ORCID iD icon 1; Schmidt, Leon; Krewer, Ulrike 1
1 Institut für Angewandte Materialien – Keramische Werkstoffe und Technologien (IAM-KWT), Karlsruher Institut für Technologie (KIT)

Traces of species in batteries are known to impact battery performance. The effects of gas species, although often reported in the electrolyte and evolving during operation, have not been systematically studied to date and are therefore barely understood. This study reveals and compares the effects of different gases on the charge-discharge characteristics, cycling stability and impedances of lithium-ion batteries. All investigated gases have been previously reported in lithium-ion batteries and are thus worth investigating: Ar, CO$_{2}$, CO, C$_{2}$H$_{4}$, C$_{2}$H$_{2}$, H$_{2}$, CH$_{4}$ and O$_{2}$. Gas-electrolyte composition has a significant influence on formation, coulombic and energy efficiencies, C-rate capability, and aging. Particularly, CO$_{2}$ and O$_{2}$ showed a higher C-rate capability and a decrease in irreversible capacity loss during the first cycle compared to Ar. Similar discharge capacities and aging behaviors are observed for CO, C$_{2}$H$_{4}$ and CH$_{4}$. Acetylene showed a large decrease in performance and cycle stability. Furthermore, electrochemical impedance spectroscopy revealed that the gases mainly contribute to changes in charge transfer processes, whereas the effects on resistance and solid electrolyte interphase performance were minor. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000134614
Veröffentlicht am 01.07.2021
DOI: 10.1002/cssc.202100845
Zitationen: 2
Web of Science
Zitationen: 2
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Elektrochemische Technologien (IAM-ET)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1864-5631, 1864-564X
KITopen-ID: 1000134614
Erschienen in ChemSusChem
Verlag Wiley-VCH Verlag
Band 14
Heft 14
Seiten 2943 – 2951
Vorab online veröffentlicht am 16.06.2021
Nachgewiesen in Web of Science
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