Metallic/Ceramic (Fe-22Cr mesh/ LaNi_0.6Fe_0.4O_3-δ) Composite as Contact Material for SOFCs

Abstract

A Fe-22Cr mesh/LaNi0.6Fe0.4O3-δ (LNF) composite, obtained via dip coating technique, was machined using a femtosecond laser as a possible gas permeable contact layer for solid oxide fuel cells (SOFCs). Both electrical performance and processing reproducibility of {Crofer22APU channeled interconnect-ablated composite contact material-La0.6Sr0.4FeO3 (LSF) cathode} structure were studied through electrochemical measurements on four replicas. For comparison, the obtained area specific resistance (ASR) data, under similar measurement conditions, for {flat Crofer22APU/LNF contact perovskite/LSF} and {channeled Crofer22APU/contact composite} setups are also presented. The results support the reproducibility for the measured ablated final systems, obtaining average ASR value of 0.06(1) Ω cm2 at 800 ºC, in air.