An elementary kinetic model for the electrochemical reduction of oxygen on LSM/YSZ composite cathodes

A. Banerjee; O. Deutschmann

doi:10.1149/06801.0713ecst

An elementary kinetic model for the electrochemical reduction of oxygen on LSM/YSZ composite cathodes

A. Banerjee, O. Deutschmann

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

3 Citations (Scopus)

Abstract

A computational half-cell model was developed to study the coupled interactions of species, electron and ion transport through porous media in addition to surface and electro-chemistry. Surface and electro-chemistry were represented using an elementary kinetic model. The model was validated against LSM/8YSZ composite cathode measurements made by Barbucci et al. [Electrochimica Acta, 47(13-14), 2183-2188 (2002)] to obtain realistic electrochemical parameters. The versatility of the micro-kinetic oxygen reduction mechanism was evaluated by predicting the performance of a pure LSM cathode. The simulated results were found to be in good agreement with measured data. A sensitivity analysis revealed that at high temperatures, ohmic resistance in the electrolyte and surface ionization of adsorbed oxygen atoms were the rate-limiting processes. At lower temperatures, dissociation of molecular oxygen adsorbed on the LSM surface and ion transfer at the LSM/YSZ interface were also found to be rate-limiting.

Original language	English
Title of host publication	Solid Oxide Fuel Cells 14, SOFC 2015
Editors	K. Eguchi, S. C. Singhal
Publisher	Electrochemical Society
Pages	713-727
Number of pages	15
Edition	1
ISBN (Electronic)	9781607685395
DOIs	https://doi.org/10.1149/06801.0713ecst
Publication status	Published - 2015
Externally published	Yes
Event	14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015 - Glasgow, United Kingdom Duration: 26 Jul 2015 → 31 Jul 2015 Conference number: 14

Publication series

Name	ECS Transactions
Number	1
Volume	68
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Conference

Conference	14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015
Abbreviated title	SOFC 2015
Country/Territory	United Kingdom
City	Glasgow
Period	26/07/15 → 31/07/15
Other	held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage

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title = "An elementary kinetic model for the electrochemical reduction of oxygen on LSM/YSZ composite cathodes",

abstract = "A computational half-cell model was developed to study the coupled interactions of species, electron and ion transport through porous media in addition to surface and electro-chemistry. Surface and electro-chemistry were represented using an elementary kinetic model. The model was validated against LSM/8YSZ composite cathode measurements made by Barbucci et al. [Electrochimica Acta, 47(13-14), 2183-2188 (2002)] to obtain realistic electrochemical parameters. The versatility of the micro-kinetic oxygen reduction mechanism was evaluated by predicting the performance of a pure LSM cathode. The simulated results were found to be in good agreement with measured data. A sensitivity analysis revealed that at high temperatures, ohmic resistance in the electrolyte and surface ionization of adsorbed oxygen atoms were the rate-limiting processes. At lower temperatures, dissociation of molecular oxygen adsorbed on the LSM surface and ion transfer at the LSM/YSZ interface were also found to be rate-limiting.",

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booktitle = "Solid Oxide Fuel Cells 14, SOFC 2015",

address = "United States",

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Banerjee, A & Deutschmann, O 2015, An elementary kinetic model for the electrochemical reduction of oxygen on LSM/YSZ composite cathodes. in K Eguchi & SC Singhal (eds), Solid Oxide Fuel Cells 14, SOFC 2015. 1 edn, ECS Transactions, no. 1, vol. 68, Electrochemical Society, pp. 713-727, 14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015, Glasgow, United Kingdom, 26/07/15. https://doi.org/10.1149/06801.0713ecst

An elementary kinetic model for the electrochemical reduction of oxygen on LSM/YSZ composite cathodes. / Banerjee, A.; Deutschmann, O.
Solid Oxide Fuel Cells 14, SOFC 2015. ed. / K. Eguchi; S. C. Singhal. 1. ed. Electrochemical Society, 2015. p. 713-727 (ECS Transactions; Vol. 68, No. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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N2 - A computational half-cell model was developed to study the coupled interactions of species, electron and ion transport through porous media in addition to surface and electro-chemistry. Surface and electro-chemistry were represented using an elementary kinetic model. The model was validated against LSM/8YSZ composite cathode measurements made by Barbucci et al. [Electrochimica Acta, 47(13-14), 2183-2188 (2002)] to obtain realistic electrochemical parameters. The versatility of the micro-kinetic oxygen reduction mechanism was evaluated by predicting the performance of a pure LSM cathode. The simulated results were found to be in good agreement with measured data. A sensitivity analysis revealed that at high temperatures, ohmic resistance in the electrolyte and surface ionization of adsorbed oxygen atoms were the rate-limiting processes. At lower temperatures, dissociation of molecular oxygen adsorbed on the LSM surface and ion transfer at the LSM/YSZ interface were also found to be rate-limiting.

AB - A computational half-cell model was developed to study the coupled interactions of species, electron and ion transport through porous media in addition to surface and electro-chemistry. Surface and electro-chemistry were represented using an elementary kinetic model. The model was validated against LSM/8YSZ composite cathode measurements made by Barbucci et al. [Electrochimica Acta, 47(13-14), 2183-2188 (2002)] to obtain realistic electrochemical parameters. The versatility of the micro-kinetic oxygen reduction mechanism was evaluated by predicting the performance of a pure LSM cathode. The simulated results were found to be in good agreement with measured data. A sensitivity analysis revealed that at high temperatures, ohmic resistance in the electrolyte and surface ionization of adsorbed oxygen atoms were the rate-limiting processes. At lower temperatures, dissociation of molecular oxygen adsorbed on the LSM surface and ion transfer at the LSM/YSZ interface were also found to be rate-limiting.

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An elementary kinetic model for the electrochemical reduction of oxygen on LSM/YSZ composite cathodes

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