Prediction of infiltrated solid oxide fuel cell cathode polarization resistance

Megna Shah; Jason D. Nicholas; Scott A. Barnett

doi:10.1016/j.elecom.2008.10.006

Prediction of infiltrated solid oxide fuel cell cathode polarization resistance

Megna Shah^*, Jason D. Nicholas, Scott A. Barnett

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

49 Scopus citations

Abstract

The polarization resistance of La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ (LSCF)-infiltrated Ce_0.9Gd_0.1O_1.95 cathodes was quantitatively explained using a simple model where the resistance scaled directly with the LSCF surface area, as estimated from cross-sectional fracture surfaces. The Tanner, Fung, Virkar composite cathode model was also applied and showed that ionic transport in these 25-μm-thick cathodes was not a significant limitation at 600 °C, but became more limiting at 700 °C. Calculated polarization resistances were within ∼40% (without fitting parameters) of reported values.

Original language	English (US)
Pages (from-to)	2-5
Number of pages	4
Journal	Electrochemistry Communications
Volume	11
Issue number	1
DOIs	https://doi.org/10.1016/j.elecom.2008.10.006
State	Published - Jan 2009

Keywords

Cathode
Infiltration
Model
Polarization resistance
SOFC

ASJC Scopus subject areas

Electrochemistry

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10.1016/j.elecom.2008.10.006

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title = "Prediction of infiltrated solid oxide fuel cell cathode polarization resistance",

abstract = "The polarization resistance of La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF)-infiltrated Ce0.9Gd0.1O1.95 cathodes was quantitatively explained using a simple model where the resistance scaled directly with the LSCF surface area, as estimated from cross-sectional fracture surfaces. The Tanner, Fung, Virkar composite cathode model was also applied and showed that ionic transport in these 25-μm-thick cathodes was not a significant limitation at 600 °C, but became more limiting at 700 °C. Calculated polarization resistances were within ∼40% (without fitting parameters) of reported values.",

keywords = "Cathode, Infiltration, Model, Polarization resistance, SOFC",

author = "Megna Shah and Nicholas, {Jason D.} and Barnett, {Scott A.}",

note = "Funding Information: This material is based upon work supported by the Department of Energy under Award No. DE-FG02-05ER46255.",

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T1 - Prediction of infiltrated solid oxide fuel cell cathode polarization resistance

AU - Shah, Megna

AU - Nicholas, Jason D.

AU - Barnett, Scott A.

N1 - Funding Information: This material is based upon work supported by the Department of Energy under Award No. DE-FG02-05ER46255.

PY - 2009/1

Y1 - 2009/1

N2 - The polarization resistance of La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF)-infiltrated Ce0.9Gd0.1O1.95 cathodes was quantitatively explained using a simple model where the resistance scaled directly with the LSCF surface area, as estimated from cross-sectional fracture surfaces. The Tanner, Fung, Virkar composite cathode model was also applied and showed that ionic transport in these 25-μm-thick cathodes was not a significant limitation at 600 °C, but became more limiting at 700 °C. Calculated polarization resistances were within ∼40% (without fitting parameters) of reported values.

AB - The polarization resistance of La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF)-infiltrated Ce0.9Gd0.1O1.95 cathodes was quantitatively explained using a simple model where the resistance scaled directly with the LSCF surface area, as estimated from cross-sectional fracture surfaces. The Tanner, Fung, Virkar composite cathode model was also applied and showed that ionic transport in these 25-μm-thick cathodes was not a significant limitation at 600 °C, but became more limiting at 700 °C. Calculated polarization resistances were within ∼40% (without fitting parameters) of reported values.

KW - Cathode

KW - Infiltration

KW - Model

KW - Polarization resistance

KW - SOFC

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DO - 10.1016/j.elecom.2008.10.006

M3 - Article

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JO - Electrochemistry Communications

JF - Electrochemistry Communications

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Prediction of infiltrated solid oxide fuel cell cathode polarization resistance

Abstract

Keywords

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