Oxygen transport properties of dense and porous (La0.8Sr0.2)0.99Co0.8Ni0.2O3-δ

Per Hjalmarsson; Martin Søgaard; Mogens Bjerg Mogensen

doi:10.1016/j.ssi.2009.07.012

Oxygen transport properties of dense and porous (La_0.8Sr_0.2)_0.99Co_0.8Ni_0.2O_3-δ

Per Hjalmarsson, Martin Søgaard, Mogens Bjerg Mogensen

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

We have determined kex and Dchem for (La0.8Sr0.2)0.99Co0.8Ni0.2O3-δ by the use of electrical conductivity relaxation on a dense sample and by applying the ALS model to measured AC impedance spectrum on a porous electrode. Extracting kex and Dchem from the methods resulted in comparable values. kex and Dchem also agreed well with literature values on La0.8Sr0.2CoO3-δ, indicating that nickel substitution does not change the oxygen transport properties. kex of the porous sample was further found to decrease with a five times higher rate than Dchem when measured by using an Electrochemical Impedance Spectroscopy (EIS) over several days.

Original language	English
Journal	Solid State Ionics
Volume	180
Issue number	23-25
Pages (from-to)	1290-1297
ISSN	0167-2738
DOIs	https://doi.org/10.1016/j.ssi.2009.07.012
Publication status	Published - 2009

Keywords

Solid Oxide Fuel Cells
Fuel Cells and hydrogen

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@article{8f30c1f24ef54c8ca6809b0d93ce8ba8,

title = "Oxygen transport properties of dense and porous (La0.8Sr0.2)0.99Co0.8Ni0.2O3-δ",

abstract = "We have determined kex and Dchem for (La0.8Sr0.2)0.99Co0.8Ni0.2O3-δ by the use of electrical conductivity relaxation on a dense sample and by applying the ALS model to measured AC impedance spectrum on a porous electrode. Extracting kex and Dchem from the methods resulted in comparable values. kex and Dchem also agreed well with literature values on La0.8Sr0.2CoO3-δ, indicating that nickel substitution does not change the oxygen transport properties. kex of the porous sample was further found to decrease with a five times higher rate than Dchem when measured by using an Electrochemical Impedance Spectroscopy (EIS) over several days.",

keywords = "Solid Oxide Fuel Cells, Fuel Cells and hydrogen, Br{\ae}ndselsceller og brint",

author = "Per Hjalmarsson and Martin S{\o}gaard and Mogensen, {Mogens Bjerg}",

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doi = "10.1016/j.ssi.2009.07.012",

language = "English",

volume = "180",

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journal = "Solid State Ionics",

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TY - JOUR

T1 - Oxygen transport properties of dense and porous (La0.8Sr0.2)0.99Co0.8Ni0.2O3-δ

AU - Hjalmarsson, Per

AU - Søgaard, Martin

AU - Mogensen, Mogens Bjerg

PY - 2009

Y1 - 2009

N2 - We have determined kex and Dchem for (La0.8Sr0.2)0.99Co0.8Ni0.2O3-δ by the use of electrical conductivity relaxation on a dense sample and by applying the ALS model to measured AC impedance spectrum on a porous electrode. Extracting kex and Dchem from the methods resulted in comparable values. kex and Dchem also agreed well with literature values on La0.8Sr0.2CoO3-δ, indicating that nickel substitution does not change the oxygen transport properties. kex of the porous sample was further found to decrease with a five times higher rate than Dchem when measured by using an Electrochemical Impedance Spectroscopy (EIS) over several days.

AB - We have determined kex and Dchem for (La0.8Sr0.2)0.99Co0.8Ni0.2O3-δ by the use of electrical conductivity relaxation on a dense sample and by applying the ALS model to measured AC impedance spectrum on a porous electrode. Extracting kex and Dchem from the methods resulted in comparable values. kex and Dchem also agreed well with literature values on La0.8Sr0.2CoO3-δ, indicating that nickel substitution does not change the oxygen transport properties. kex of the porous sample was further found to decrease with a five times higher rate than Dchem when measured by using an Electrochemical Impedance Spectroscopy (EIS) over several days.

KW - Solid Oxide Fuel Cells

KW - Fuel Cells and hydrogen

KW - Brændselsceller og brint

U2 - 10.1016/j.ssi.2009.07.012

DO - 10.1016/j.ssi.2009.07.012

M3 - Journal article

SN - 0167-2738

VL - 180

SP - 1290

EP - 1297

JO - Solid State Ionics

JF - Solid State Ionics

IS - 23-25

ER -