Effect of the electrode potential on the surface composition and crystal structure of LiMn2O4 in aqueous solutions

Cubic spinel LiMn2O4 has been studied for the reversible extraction of Li+ from natural brine after the application of suitable electrode potentials. In this work we report on the insertion/extraction of Li+ from natural brine of Olaroz salt flat (Jujuy, Argentina) and aqueous LiCl solutions into/fr...

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Detalles Bibliográficos
Autores principales:	Marchini, F., Calvo, E.J., Williams, F.J.
Formato:	JOUR
Materias:	Battery electrode Extraction LiMn2O4 Lithium XPS XRD Chlorine compounds Electrodes Lithium batteries Lithium compounds Lithium-ion batteries Manganese compounds Solutions X ray photoelectron spectroscopy Electrochemical polarization Electrode potentials Electrode surfaces Organic electrolyte Potential windows Two-stage process Crystal structure
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00134686_v269_n_p706_Marchini
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00134686_v269_n_p706_Marchini
record_format	dspace
spelling	todo:paper_00134686_v269_n_p706_Marchini2023-10-03T14:10:53Z Effect of the electrode potential on the surface composition and crystal structure of LiMn2O4 in aqueous solutions Marchini, F. Calvo, E.J. Williams, F.J. Battery electrode Extraction LiMn2O4 Lithium XPS XRD Chlorine compounds Electrodes Extraction Lithium Lithium batteries Lithium compounds Lithium-ion batteries Manganese compounds Solutions X ray photoelectron spectroscopy Battery electrode Electrochemical polarization Electrode potentials Electrode surfaces LiMn2O4 Organic electrolyte Potential windows Two-stage process Crystal structure Cubic spinel LiMn2O4 has been studied for the reversible extraction of Li+ from natural brine after the application of suitable electrode potentials. In this work we report on the insertion/extraction of Li+ from natural brine of Olaroz salt flat (Jujuy, Argentina) and aqueous LiCl solutions into/from Li1-xMn2O4 (0 < x ≤ 1) to determine changes in the crystal structure and surface composition upon electrochemical polarization. In agreement with the behavior in organic electrolytes, we found that the insertion and extraction of Li+ proceeds via a two stage process and that the crystal structure undergoes two cubic phase transitions as the lattice is expanded or contracted. Contrary to the behavior in organic solvents, no decomposition layer is formed on the electrode surface and the surface composition can be controlled with the electrode potential. We also found that sodium cations present in natural brine are not inserted into the crystal lattice in the potential window explored, however they are adsorbed on the oxide surface blocking Li+ adsorption sites and decreasing the rate of Li+ exchange. © 2018 Elsevier Ltd JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00134686_v269_n_p706_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	Battery electrode Extraction LiMn2O4 Lithium XPS XRD Chlorine compounds Electrodes Extraction Lithium Lithium batteries Lithium compounds Lithium-ion batteries Manganese compounds Solutions X ray photoelectron spectroscopy Battery electrode Electrochemical polarization Electrode potentials Electrode surfaces LiMn2O4 Organic electrolyte Potential windows Two-stage process Crystal structure
spellingShingle	Battery electrode Extraction LiMn2O4 Lithium XPS XRD Chlorine compounds Electrodes Extraction Lithium Lithium batteries Lithium compounds Lithium-ion batteries Manganese compounds Solutions X ray photoelectron spectroscopy Battery electrode Electrochemical polarization Electrode potentials Electrode surfaces LiMn2O4 Organic electrolyte Potential windows Two-stage process Crystal structure Marchini, F. Calvo, E.J. Williams, F.J. Effect of the electrode potential on the surface composition and crystal structure of LiMn2O4 in aqueous solutions
topic_facet	Battery electrode Extraction LiMn2O4 Lithium XPS XRD Chlorine compounds Electrodes Extraction Lithium Lithium batteries Lithium compounds Lithium-ion batteries Manganese compounds Solutions X ray photoelectron spectroscopy Battery electrode Electrochemical polarization Electrode potentials Electrode surfaces LiMn2O4 Organic electrolyte Potential windows Two-stage process Crystal structure
description	Cubic spinel LiMn2O4 has been studied for the reversible extraction of Li+ from natural brine after the application of suitable electrode potentials. In this work we report on the insertion/extraction of Li+ from natural brine of Olaroz salt flat (Jujuy, Argentina) and aqueous LiCl solutions into/from Li1-xMn2O4 (0 < x ≤ 1) to determine changes in the crystal structure and surface composition upon electrochemical polarization. In agreement with the behavior in organic electrolytes, we found that the insertion and extraction of Li+ proceeds via a two stage process and that the crystal structure undergoes two cubic phase transitions as the lattice is expanded or contracted. Contrary to the behavior in organic solvents, no decomposition layer is formed on the electrode surface and the surface composition can be controlled with the electrode potential. We also found that sodium cations present in natural brine are not inserted into the crystal lattice in the potential window explored, however they are adsorbed on the oxide surface blocking Li+ adsorption sites and decreasing the rate of Li+ exchange. © 2018 Elsevier Ltd
format	JOUR
author	Marchini, F. Calvo, E.J. Williams, F.J.
author_facet	Marchini, F. Calvo, E.J. Williams, F.J.
author_sort	Marchini, F.
title	Effect of the electrode potential on the surface composition and crystal structure of LiMn2O4 in aqueous solutions
title_short	Effect of the electrode potential on the surface composition and crystal structure of LiMn2O4 in aqueous solutions
title_full	Effect of the electrode potential on the surface composition and crystal structure of LiMn2O4 in aqueous solutions
title_fullStr	Effect of the electrode potential on the surface composition and crystal structure of LiMn2O4 in aqueous solutions
title_full_unstemmed	Effect of the electrode potential on the surface composition and crystal structure of LiMn2O4 in aqueous solutions
title_sort	effect of the electrode potential on the surface composition and crystal structure of limn2o4 in aqueous solutions
url	http://hdl.handle.net/20.500.12110/paper_00134686_v269_n_p706_Marchini
work_keys_str_mv	AT marchinif effectoftheelectrodepotentialonthesurfacecompositionandcrystalstructureoflimn2o4inaqueoussolutions AT calvoej effectoftheelectrodepotentialonthesurfacecompositionandcrystalstructureoflimn2o4inaqueoussolutions AT williamsfj effectoftheelectrodepotentialonthesurfacecompositionandcrystalstructureoflimn2o4inaqueoussolutions
_version_	1807321652649787392

Effect of the electrode potential on the surface composition and crystal structure of LiMn2O4 in aqueous solutions

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