| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1298565 | Solid State Ionics | 2009 | 8 Pages |
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.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Per Hjalmarsson, Martin Søgaard, Mogens Mogensen,