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Comprehensive characterization of propylene carbonate based liquid electrolyte mixtures for sodium-ion cells

Hofmann, Andreas; Wang, Zhengqi; Bautista, Sebastian Pinto; Weil, Marcel; Müller, Freya; Löwe, Robert; Schneider, Luca; Mohsin, Ijaz Ul ORCID iD icon; Hanemann, Thomas

Abstract (englisch):

In this study, 1 M sodium perchlorate (NaClO4) containing binary electrolytes based on propylene carbonate and X (X = dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, dipropyl carbonate, ethylene carbonate, 1,2-butylene carbonate, monoglyme, diglyme, tetraglyme, sulfolane) are studied due to their electrochemical and physicochemical properties as well as compatibility with sodium metal. The reactivity towards sodium is compared between mixtures with and without NaClO4 and degradation products are analyzed by gas chromatography. It is shown that NaClO4 plays a crucial role in electrolyte decomposition and gas formation. It could be shown that mixtures of linear and cyclic carbonates form coupling products during storage with Na metal, namely dialkane propane-1,2-diyl dicarbonates, independently of the presence of sodium perchlorate. Additionally, gas analysis of PC electrolyte over Na shows a pronounced formation of CO and propylene oxide during storage if NaClO4 is present in the sample. Overall, the electrolyte “PC+EC+NaClO4” is identified as most favorable system within the examined series with respect to decomposition characteristics (formation of decomposition products) as well as acceptable physicochemical and electrochemical properties, e.g. ... mehr

Postprint §
DOI: 10.5445/IR/1000140956
Veröffentlicht am 03.12.2022
DOI: 10.1016/j.electacta.2021.139670
Zitationen: 2
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien (IAM)
Institut für Technikfolgenabschätzung und Systemanalyse (ITAS)
Post Lithium Storage (POLiS)
Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0013-4686
KITopen-ID: 1000140956
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Weitere HGF-Programme 37.11.02 (POF IV, LK 01) Societally-Feasible Transformation Pathways
Erschienen in Electrochimica acta
Verlag Elsevier
Band 403
Seiten Art.Nr.: 139670
Projektinformation EXC 2154/1; POLiS (DFG, DFG EXSTRAT, EXC 2154/1_I)
Vorab online veröffentlicht am 02.12.2021
Schlagwörter Sodium-ion cell, electrolyte, propylene carbonate, sodium perchlorate
Nachgewiesen in Dimensions
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