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Abstract:

The reusability, non-volatility and non-corrosiveness of ionic liquids (ILs), as well as their ease of isolation and a large electrochemical stability window, make them an interesting choice as environmentally friendly electrolytes for metal/air batteries. ILs have been described as designer solvents as their properties and behaviour can be adjusted to suit an individual reaction need. In the framework of this study we applied a conceptually similar design approach and showed that a simple parameter such as the concentration of a Li + dopant dramatically affects the reaction yields of Li/O 2 based energy storage devices. We studied the effect of Li + concentration from 0.1 to 1 M in a LiTFSI:PYR 14 TFSI ionic liquid electrolyte on the kinetics of the oxygen reduction reaction (ORR) and on the formation rate of different Li-O species at two different temperatures, finding that the discharge capacity, rates and product distribution change in a non-linear way. At 60 °C, the highest rates and up to one order of magnitude larger capacities were observed at intermediate LiTFSI concentrations, implying a complete mechanism switch from surface to volume phase mediation for Li 2 O 2 precipitation. At room temperature the same evolution was observed, even if in this case the surface mediation remained predominant at all concentrations. These results suggest the possibility to optimise the ionic liquid based Li/O 2 battery performances in terms of discharge capacity and lithium use, by tuning the temperature and alkali cation concentration. © The Royal Society of Chemistry 2018.

Registro:

Documento: Artículo
Título:Tailoring oxygen redox reactions in ionic liquid based Li/O 2 batteries by means of the Li + dopant concentration
Autor:Cecchetto, L.; Tesio, A.Y.; Olivares-Marín, M.; Espinasa, M.G.; Croce, F.; Tonti, D.
Filiación:Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigaciones Científicas (ICMAB-CSIC), Campus UAB, Bellaterra Barcelona, ES 08193, Spain
INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 2, Buenos Aires, AR-1428, Argentina
MATGAS Campus UAB, Bellaterra Barcelona, ES 08193, Spain
Dipartimento di Farmacia, Università d'Annunzio Chieti-Pescara, Via dei Vestini 31, Chieti, 66100, Italy
Departamento de Ingeniería Mecánica, Energética y de Los Materiales, Universidad de Extremadura, Centro Universitario de Mérida, Merida, 06800, Spain
Palabras clave:Electric batteries; Electrolytes; Electrolytic reduction; Ionic liquids; Lithium batteries; Oxygen; Reaction rates; Redox reactions; Reusability; Battery performance; Discharge capacities; Dopant concentrations; Electrochemical stabilities; Ionic liquid electrolytes; Oxygen redox reactions; Oxygen reduction reaction; Product distributions; Lithium compounds; concentration (composition); design; electrolyte; energy storage; equipment component; ionic liquid; lithium; oxide group; oxygen; precipitation (chemistry); reaction kinetics; redox conditions
Año:2018
Volumen:2
Número:1
Página de inicio:118
Página de fin:124
DOI: http://dx.doi.org/10.1039/c7se00389g
Título revista:Sustainable Energy and Fuels
Título revista abreviado:Sustain. Energy Fuels
ISSN:23984902
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_23984902_v2_n1_p118_Cecchetto

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Citas:

---------- APA ----------
Cecchetto, L., Tesio, A.Y., Olivares-Marín, M., Espinasa, M.G., Croce, F. & Tonti, D. (2018) . Tailoring oxygen redox reactions in ionic liquid based Li/O 2 batteries by means of the Li + dopant concentration. Sustainable Energy and Fuels, 2(1), 118-124.
http://dx.doi.org/10.1039/c7se00389g
---------- CHICAGO ----------
Cecchetto, L., Tesio, A.Y., Olivares-Marín, M., Espinasa, M.G., Croce, F., Tonti, D. "Tailoring oxygen redox reactions in ionic liquid based Li/O 2 batteries by means of the Li + dopant concentration" . Sustainable Energy and Fuels 2, no. 1 (2018) : 118-124.
http://dx.doi.org/10.1039/c7se00389g
---------- MLA ----------
Cecchetto, L., Tesio, A.Y., Olivares-Marín, M., Espinasa, M.G., Croce, F., Tonti, D. "Tailoring oxygen redox reactions in ionic liquid based Li/O 2 batteries by means of the Li + dopant concentration" . Sustainable Energy and Fuels, vol. 2, no. 1, 2018, pp. 118-124.
http://dx.doi.org/10.1039/c7se00389g
---------- VANCOUVER ----------
Cecchetto, L., Tesio, A.Y., Olivares-Marín, M., Espinasa, M.G., Croce, F., Tonti, D. Tailoring oxygen redox reactions in ionic liquid based Li/O 2 batteries by means of the Li + dopant concentration. Sustain. Energy Fuels. 2018;2(1):118-124.
http://dx.doi.org/10.1039/c7se00389g