Metallic/Ceramic (Fe-22Cr mesh/LaNi_(0.6)Fe_(0.4)O_(3-δ)) Composite as Contact Material for SOFCs

摘要

A Fe-22Cr mesh/LaNi_(0.6)Fe_(0.4)O_(3-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-La_(0.6)Sr_(0.4)FeO_3 (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 cm~2 at 800°C, in air.