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INVESTIGATION OF POROUS ELECTRODES BY CURRENT INTERRUPTION APPLICATION TO MOLTEN CARBONATE FUEL CELL CATHODES
KTH, Superseded Departments, Chemical Engineering and Technology.ORCID iD: 0000-0002-2268-5042
KTH, Superseded Departments, Chemical Engineering and Technology.ORCID iD: 0000-0001-9203-9313
KTH, Superseded Departments, Chemical Engineering and Technology.
1995 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 142, no 3, 787-797 p.Article in journal (Refereed) Published
Abstract [en]

A transient agglomerate model for simulation and analysis of experimental data, obtained by current interruption on porous molten carbonate fuel cell cathodes, is presented. The initial fast change of the potential after current interruption on a polarized NiO electrode is due to the closed-circuit potential distribution in the electrode. Conventional estimation of the iR corrected overvoltage by current interruption on porous electrodes, with finite electronic conductivity in the solid phase and a finite ionic conductivity of the pore electrolyte, leads to an overcompensation of the external potential drop and an underestimation of the total steady-state overvoltage due to the internal currents passing in the electrode after interruption. The overcompensation of the external potential drop is directly proportional to the geometric current density and to the thickness of the electrode and inversely proportional to the sum df the effective conductivities in the electrode matrix and the pore electrolyte.

Place, publisher, year, edition, pages
1995. Vol. 142, no 3, 787-797 p.
Keyword [en]
POLARIZATION, MODEL, ANODE
Identifiers
URN: urn:nbn:se:kth:diva-12879ISI: A1995QL58500027OAI: oai:DiVA.org:kth-12879DiVA: diva2:319509
Note
QC 20100518Available from: 2010-05-18 Created: 2010-05-18 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Electrochemical performance of porous MCFC cathodes
Open this publication in new window or tab >>Electrochemical performance of porous MCFC cathodes
1997 (English)Doctoral thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 1997. ix, 55 p.
Series
Trita-KET, ISSN 1104-3466
Keyword
molten carbonate fuel cell, MCFC cathode, LiCoO2, NiO, porous electrode, polarisation, performance, reaction mechanisms, conductivity
National Category
Chemical Engineering
Identifiers
urn:nbn:se:kth:diva-2473 (URN)99-2384406-4 (ISBN)
Public defence
1997-03-01, 00:00 (English)
Note
QC 20100511Available from: 2000-01-01 Created: 2000-01-01 Last updated: 2010-05-18Bibliographically approved

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