Room temperature ionic liquids versus organic solvents as lithium-oxygen battery electrolytes
Knipping, Etienne ![Identificador ORCID](/img/uab/orcid.ico)
(Universitat Autònoma de Barcelona. Departament de Química)
Aucher, Christophe ![Identificador ORCID](/img/uab/orcid.ico)
(Leitat Technological Center (Terrassa))
Guirado López, Gonzalo ![Identificador ORCID](/img/uab/orcid.ico)
(Universitat Autònoma de Barcelona. Departament de Química)
Aubouy, Laurent (Leitat Technological Center (Terrassa))
Data: |
2018 |
Resum: |
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. |
Ajuts: |
European Commission 314508 Ministerio de Economía y Competitividad CTQ2015-65439-R
|
Drets: |
Tots els drets reservats. ![](/img/licenses/InC.ico) |
Llengua: |
Anglès |
Document: |
Article ; recerca ; Versió acceptada per publicar |
Matèria: |
Room temperature ionic liquid ;
Electrolyte ;
Li-O2 battery ;
Ionic conductivity ;
Lithium solvation |
Publicat a: |
New journal of chemistry, Vol. 42, Issue 6 (March 2018) , p. 4693-4699, ISSN 1369-9261 |
DOI: 10.1039/c8nj00449h
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Registre creat el 2023-05-09, darrera modificació el 2023-07-11