Interaction between Crofer 22 APU Current Collector and LSCF Cathode Contacting Layer under Cell Operation

Abstract

In this work the oxidation of Crofer 22 APU and its interaction with La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF) applied as contacting layer have been investigated in air at 750°C under a current load of 0.5 Acm -2 with the aim to reproduce as close as possible the interconnect interface in real operating conditions. The effects of such interaction and of the pre-oxidation treatment have been studied by means of ASR measurement and post-experiment characterizations. The behavior of such samples has been compared with the results on a working Crofer 22 APU bipolar plate tested as cathode current collector of an anode-supported cell reproducing the stack cathode compartment conditions.