Comment on “Out-of-Cell Oxygen Diffusivity Evaluation in Lithium–Air Batteries” by He et al.

In a recent paper, He et al. (ChemElectroChem 2014, 1, 2052–2057) described a methodology for measuring out-of-cell oxygen diffusivity in lithium–air battery (LAB) cathodes, combining an electrochemical device with a classical gas-transport model. We will demonstrate here that the authors erroneousl...

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Autor principal:	Corti, Horacio Roberto
Publicado:	2017
Materias:	Cathodes Diffusion Electric batteries Electrodes Electrolytes Oxygen Current output Electrochemical devices Gas transport Gaseous oxygen Knudsen diffusivity Lithium-air battery Oxygen diffusivity Porous cathodes Lithium batteries
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21960216_v4_n2_p450_Corti http://hdl.handle.net/20.500.12110/paper_21960216_v4_n2_p450_Corti
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_21960216_v4_n2_p450_Corti
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spelling	paper:paper_21960216_v4_n2_p450_Corti2023-06-08T16:35:09Z Comment on “Out-of-Cell Oxygen Diffusivity Evaluation in Lithium–Air Batteries” by He et al. Corti, Horacio Roberto Cathodes Diffusion Electric batteries Electrodes Electrolytes Oxygen Current output Electrochemical devices Gas transport Gaseous oxygen Knudsen diffusivity Lithium-air battery Oxygen diffusivity Porous cathodes Lithium batteries In a recent paper, He et al. (ChemElectroChem 2014, 1, 2052–2057) described a methodology for measuring out-of-cell oxygen diffusivity in lithium–air battery (LAB) cathodes, combining an electrochemical device with a classical gas-transport model. We will demonstrate here that the authors erroneously assumed that the Knudsen diffusivity of gaseous oxygen in the porous cathode is smaller than the diffusivity in the electrolyte and, consequently, that the oxygen mass transport would limit the current output of the battery. Therefore, it is impossible to determine the oxygen diffusivity in LAB cathodes by using the electrochemical device proposed by the authors, comprising an oxygen pump, the LAB cathode, and an oxygen sensor. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Fil:Corti, H.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21960216_v4_n2_p450_Corti http://hdl.handle.net/20.500.12110/paper_21960216_v4_n2_p450_Corti
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 Diffusion Electric batteries Electrodes Electrolytes Oxygen Current output Electrochemical devices Gas transport Gaseous oxygen Knudsen diffusivity Lithium-air battery Oxygen diffusivity Porous cathodes Lithium batteries
spellingShingle	Cathodes Diffusion Electric batteries Electrodes Electrolytes Oxygen Current output Electrochemical devices Gas transport Gaseous oxygen Knudsen diffusivity Lithium-air battery Oxygen diffusivity Porous cathodes Lithium batteries Corti, Horacio Roberto Comment on “Out-of-Cell Oxygen Diffusivity Evaluation in Lithium–Air Batteries” by He et al.
topic_facet	Cathodes Diffusion Electric batteries Electrodes Electrolytes Oxygen Current output Electrochemical devices Gas transport Gaseous oxygen Knudsen diffusivity Lithium-air battery Oxygen diffusivity Porous cathodes Lithium batteries
description	In a recent paper, He et al. (ChemElectroChem 2014, 1, 2052–2057) described a methodology for measuring out-of-cell oxygen diffusivity in lithium–air battery (LAB) cathodes, combining an electrochemical device with a classical gas-transport model. We will demonstrate here that the authors erroneously assumed that the Knudsen diffusivity of gaseous oxygen in the porous cathode is smaller than the diffusivity in the electrolyte and, consequently, that the oxygen mass transport would limit the current output of the battery. Therefore, it is impossible to determine the oxygen diffusivity in LAB cathodes by using the electrochemical device proposed by the authors, comprising an oxygen pump, the LAB cathode, and an oxygen sensor. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
author	Corti, Horacio Roberto
author_facet	Corti, Horacio Roberto
author_sort	Corti, Horacio Roberto
title	Comment on “Out-of-Cell Oxygen Diffusivity Evaluation in Lithium–Air Batteries” by He et al.
title_short	Comment on “Out-of-Cell Oxygen Diffusivity Evaluation in Lithium–Air Batteries” by He et al.
title_full	Comment on “Out-of-Cell Oxygen Diffusivity Evaluation in Lithium–Air Batteries” by He et al.
title_fullStr	Comment on “Out-of-Cell Oxygen Diffusivity Evaluation in Lithium–Air Batteries” by He et al.
title_full_unstemmed	Comment on “Out-of-Cell Oxygen Diffusivity Evaluation in Lithium–Air Batteries” by He et al.
title_sort	comment on “out-of-cell oxygen diffusivity evaluation in lithium–air batteries” by he et al.
publishDate	2017
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21960216_v4_n2_p450_Corti http://hdl.handle.net/20.500.12110/paper_21960216_v4_n2_p450_Corti
work_keys_str_mv	AT cortihoracioroberto commentonoutofcelloxygendiffusivityevaluationinlithiumairbatteriesbyheetal
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Comment on “Out-of-Cell Oxygen Diffusivity Evaluation in Lithium–Air Batteries” by He et al.

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