Surface Study of Lithium-Air Battery Oxygen Cathodes in Different Solvent-Electrolyte pairs

The O<inf>2</inf>/Li<inf>2</inf>O<inf>2</inf> electrode reaction has been studied on low surface area Au electrodes in three solvent-electrolyte pairs (0.1 M LiPF<inf>6</inf>/DMSO, LiPF<inf>6</inf>/ACN, and LiBF<inf>4</inf>/ACN)...

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Detalles Bibliográficos
Autores principales:	Williams, Federico Jose, Calvo, Ernesto Julio
Publicado:	2015
Materias:	Cathodes Electric batteries Electrodes Electrolytes Lithium Lithium batteries Phosphorus compounds Reduction Solvents X ray photoelectron spectroscopy Carbonate surfaces Decomposition products Different solvents Electrode potentials Electrode reactions Electrolyte decomposition Lithium-air battery Solvent decompositions Electrochemical electrodes
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v31_n33_p9236_Marchini http://hdl.handle.net/20.500.12110/paper_07437463_v31_n33_p9236_Marchini
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_07437463_v31_n33_p9236_Marchini
record_format	dspace
spelling	paper:paper_07437463_v31_n33_p9236_Marchini2023-06-08T15:45:02Z Surface Study of Lithium-Air Battery Oxygen Cathodes in Different Solvent-Electrolyte pairs Williams, Federico Jose Calvo, Ernesto Julio Cathodes Electric batteries Electrodes Electrolytes Lithium Lithium batteries Phosphorus compounds Reduction Solvents X ray photoelectron spectroscopy Carbonate surfaces Decomposition products Different solvents Electrode potentials Electrode reactions Electrolyte decomposition Lithium-air battery Solvent decompositions Electrochemical electrodes The O<inf>2</inf>/Li<inf>2</inf>O<inf>2</inf> electrode reaction has been studied on low surface area Au electrodes in three solvent-electrolyte pairs (0.1 M LiPF<inf>6</inf>/DMSO, LiPF<inf>6</inf>/ACN, and LiBF<inf>4</inf>/ACN) using an electrochemical cell coupled to UHV XPS spectrometer, EQCM, AFM, and DEMS. The XPS spectra of the surfaces after treatment at selected electrode potentials for the O<inf>2</inf> reduction and reoxidation of the surface show the presence of C and S from solvent decomposition and of F and P from electrolyte decomposition. Furthermore, Li 1s and O 1s peaks due to Li<inf>2</inf>O<inf>2</inf> and decomposition products such as carbonate, organics, LiF, high oxidation sulfur, and phosphorus compounds were also observed. Using ACN instead of DMSO results in less solvent decomposition, whereas using LiBF<inf>4</inf> results in less electrolyte decomposition. XPS, AFM, and EQCM show that O<inf>2</inf> reduction products removal only takes place at very high overpotentials. In agreement with XPS which shows removal of carbonate surface species, DEMS confirms evolution of CO<inf>2</inf> and consumption of O<inf>2</inf> at 4.5 V, but LiF cannot be removed completely in a round trip of the Li-O<inf>2</inf> battery cathode. © 2015 American Chemical Society. Fil:Williams, F.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Calvo, E.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v31_n33_p9236_Marchini http://hdl.handle.net/20.500.12110/paper_07437463_v31_n33_p9236_Marchini
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cathodes Electric batteries Electrodes Electrolytes Lithium Lithium batteries Phosphorus compounds Reduction Solvents X ray photoelectron spectroscopy Carbonate surfaces Decomposition products Different solvents Electrode potentials Electrode reactions Electrolyte decomposition Lithium-air battery Solvent decompositions Electrochemical electrodes
spellingShingle	Cathodes Electric batteries Electrodes Electrolytes Lithium Lithium batteries Phosphorus compounds Reduction Solvents X ray photoelectron spectroscopy Carbonate surfaces Decomposition products Different solvents Electrode potentials Electrode reactions Electrolyte decomposition Lithium-air battery Solvent decompositions Electrochemical electrodes Williams, Federico Jose Calvo, Ernesto Julio Surface Study of Lithium-Air Battery Oxygen Cathodes in Different Solvent-Electrolyte pairs
topic_facet	Cathodes Electric batteries Electrodes Electrolytes Lithium Lithium batteries Phosphorus compounds Reduction Solvents X ray photoelectron spectroscopy Carbonate surfaces Decomposition products Different solvents Electrode potentials Electrode reactions Electrolyte decomposition Lithium-air battery Solvent decompositions Electrochemical electrodes
description	The O<inf>2</inf>/Li<inf>2</inf>O<inf>2</inf> electrode reaction has been studied on low surface area Au electrodes in three solvent-electrolyte pairs (0.1 M LiPF<inf>6</inf>/DMSO, LiPF<inf>6</inf>/ACN, and LiBF<inf>4</inf>/ACN) using an electrochemical cell coupled to UHV XPS spectrometer, EQCM, AFM, and DEMS. The XPS spectra of the surfaces after treatment at selected electrode potentials for the O<inf>2</inf> reduction and reoxidation of the surface show the presence of C and S from solvent decomposition and of F and P from electrolyte decomposition. Furthermore, Li 1s and O 1s peaks due to Li<inf>2</inf>O<inf>2</inf> and decomposition products such as carbonate, organics, LiF, high oxidation sulfur, and phosphorus compounds were also observed. Using ACN instead of DMSO results in less solvent decomposition, whereas using LiBF<inf>4</inf> results in less electrolyte decomposition. XPS, AFM, and EQCM show that O<inf>2</inf> reduction products removal only takes place at very high overpotentials. In agreement with XPS which shows removal of carbonate surface species, DEMS confirms evolution of CO<inf>2</inf> and consumption of O<inf>2</inf> at 4.5 V, but LiF cannot be removed completely in a round trip of the Li-O<inf>2</inf> battery cathode. © 2015 American Chemical Society.
author	Williams, Federico Jose Calvo, Ernesto Julio
author_facet	Williams, Federico Jose Calvo, Ernesto Julio
author_sort	Williams, Federico Jose
title	Surface Study of Lithium-Air Battery Oxygen Cathodes in Different Solvent-Electrolyte pairs
title_short	Surface Study of Lithium-Air Battery Oxygen Cathodes in Different Solvent-Electrolyte pairs
title_full	Surface Study of Lithium-Air Battery Oxygen Cathodes in Different Solvent-Electrolyte pairs
title_fullStr	Surface Study of Lithium-Air Battery Oxygen Cathodes in Different Solvent-Electrolyte pairs
title_full_unstemmed	Surface Study of Lithium-Air Battery Oxygen Cathodes in Different Solvent-Electrolyte pairs
title_sort	surface study of lithium-air battery oxygen cathodes in different solvent-electrolyte pairs
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v31_n33_p9236_Marchini http://hdl.handle.net/20.500.12110/paper_07437463_v31_n33_p9236_Marchini
work_keys_str_mv	AT williamsfedericojose surfacestudyoflithiumairbatteryoxygencathodesindifferentsolventelectrolytepairs AT calvoernestojulio surfacestudyoflithiumairbatteryoxygencathodesindifferentsolventelectrolytepairs
_version_	1768545837122584576

Surface Study of Lithium-Air Battery Oxygen Cathodes in Different Solvent-Electrolyte pairs

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