Abstract
The effect of cation nonstoichiometry on the enhancement of surface reaction kinetics of oxide cathode has been studied with bi-layer (La,Sr)CoO3 and LaCoO3 dense thin film electrodes fabricated by an RF-sputtering method for improving the solid oxide fuel cells’ performance. The bi-layer electrodes with cation (A-site or B-site) deficiency at surface show higher surface reaction kinetics than the cation-stoichiometric electrode, which is related to the increase of oxygen vacancy induced by cation vacancy. Additionally the P O2 dependence of the interfacial conductivity is analyzed based on a defect chemical model in consideration of “cation deficiency”, which supports the effect of cation nonstoichiometry.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
