Conducting Property and Performance Evaluation of LNF as Cathode Current Contact Layer in Solid Oxide Fuel Cell

Abstract

In this work, LaNi0.6Fe0.4O3 is prepared and applied as cathode current contact layer on anode supported SOFC. The conducting property of both thin (~7μm) and thick LNF film (~1mm) are tested using lateral Van der Pauw DC conductivity test method and direct DC conductivity test method. Results show that the LNF layer prominently improves electrochemical performance of industrial sized anode supported single cell by ~29% at voltage of 0.7V at 800 and 750℃. During long-term annealing, 950℃ pre-fired LNF film performs more stable conducting property than 900℃ prepared sample. While the area specific resistance of LNF thick film shows a small increasing by ~0.272% per 1000 hours at 750℃, under constant current load. Suggesting good application prospects in planar solid oxide fuel cell stack.