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INVESTIGATION OF POROUS ELECTRODES BY CURRENT INTERRUPTION APPLICATION TO MOLTEN CARBONATE FUEL CELL CATHODES
KTH, Tidigare Institutioner                               , Kemiteknik.ORCID-id: 0000-0002-2268-5042
KTH, Tidigare Institutioner                               , Kemiteknik.ORCID-id: 0000-0001-9203-9313
KTH, Tidigare Institutioner                               , Kemiteknik.
1995 (engelsk)Inngår i: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 142, nr 3, s. 787-797Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
1995. Vol. 142, nr 3, s. 787-797
Emneord [en]
POLARIZATION, MODEL, ANODE
Identifikatorer
URN: urn:nbn:se:kth:diva-12879ISI: A1995QL58500027OAI: oai:DiVA.org:kth-12879DiVA, id: diva2:319509
Merknad
QC 20100518Tilgjengelig fra: 2010-05-18 Laget: 2010-05-18 Sist oppdatert: 2017-12-12bibliografisk kontrollert
Inngår i avhandling
1. Electrochemical performance of porous MCFC cathodes
Åpne denne publikasjonen i ny fane eller vindu >>Electrochemical performance of porous MCFC cathodes
1997 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Stockholm: KTH, 1997. s. ix, 55
Serie
Trita-KET, ISSN 1104-3466
Emneord
molten carbonate fuel cell, MCFC cathode, LiCoO2, NiO, porous electrode, polarisation, performance, reaction mechanisms, conductivity
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-2473 (URN)99-2384406-4 (ISBN)
Disputas
1997-03-01, 00:00 (engelsk)
Merknad
QC 20100511Tilgjengelig fra: 2000-01-01 Laget: 2000-01-01 Sist oppdatert: 2010-05-18bibliografisk kontrollert

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