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Página principal > Artículos > Artículos publicados > Room temperature ionic liquids versus organic solvents as lithium-oxygen battery electrolytes |
Fecha: | 2018 |
Resumen: | Imidazolium, pyrrolidinium and piperidinium room temperature ionic liquids (RTILs) are characterized to evaluate their thermal stability, ionic conductivity, viscosity, potential window and lithium solvation, which are key parameters for lithium-oxygen (Li-O) battery electrolytes. The electrochemical tests of these RTILs are also carried out in Li-O cells and show reasonable values of specific capacity, up to 1659 mA h per gram of carbon in the case of 1-propyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (PMI TFSI) with a molar fraction of 0. 2 of LiTFSI. RTILs are compared with conventional organic electrolytes like ethylene carbonate (EC)/diethyl carbonate (DEC) solution or tetraethylene glycol dimethyl ether (TEGDME), which enables us to provide a further insight into ways of improving the electrolyte properties of Li-O batteries. In particular, a viscosity lower than 100 cP combined with a lithium coordination number lower than 1. 5 tends to enhance the battery performance. |
Ayudas: | European Commission 314508 Ministerio de Economía y Competitividad CTQ2015-65439-R |
Derechos: | Tots els drets reservats. |
Lengua: | Anglès |
Documento: | Article ; recerca ; Versió acceptada per publicar |
Materia: | Room temperature ionic liquid ; Electrolyte ; Li-O2 battery ; Ionic conductivity ; Lithium solvation |
Publicado en: | New journal of chemistry, Vol. 42, Issue 6 (March 2018) , p. 4693-4699, ISSN 1369-9261 |
Postprint 10 p, 1.1 MB |