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

摘要

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.