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 proceedingConference contributionAcademicpeer-review

2 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 languageEnglish
Title of host publicationSolid Oxide Fuel Cells 14, SOFC 2015
EditorsK. Eguchi, S. C. Singhal
PublisherThe Electrochemical Society Inc.
Pages713-727
Number of pages15
Edition1
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2015
Externally publishedYes
Event14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015 - Glasgow, United Kingdom
Duration: 26 Jul 201531 Jul 2015
Conference number: 14

Publication series

NameECS Transactions
Number1
Volume68
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

Conference14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015
Abbreviated titleSOFC 2015
CountryUnited Kingdom
CityGlasgow
Period26/07/1531/07/15
Otherheld as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage

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