TY - JOUR

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

A1 - Hjalmarsson,Per

A1 - Søgaard,Martin

A1 - Mogensen,Mogens Bjerg

AU - Hjalmarsson,Per

AU - Søgaard,Martin

AU - Mogensen,Mogens Bjerg

PB - Elsevier BV North-Holland

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

JO - Solid State Ionics

JF - Solid State Ionics

SN - 0167-2738

IS - 23-25

VL - 180

SP - 1290

EP - 1297

ER -