Study of 2R Cell equipped with LSC and LSCF Cathodes under Thermic and Redox Cycling

In this article we present the results of 2R -Cell, developed by Fiaxell, tested under thermic and redox cycles. Different cathodes were studied, composite LSC-GDC and LSCF, and degradation due to multiple thermic and redox cycles was observed. Three composite LSC-GDC cathodes were tested (40, 60 and 75 % GDC). The highest current density was achieved by the cathode with 75% amount of GDC, at 1060 [mA/cm 2 ] at 0.8 V and 780°C, before thermic cycling. This cell underwent 40 thermic cycles with an average power loss of 0.7 % per cycle. A LSCF cathode equipped 2R-Cell, tested by EPFL, our partner in an EU project (Roxsolidcell), was subjected to 20 thermic cycles and 20 redox cycles. With this cathode material the average ASR increase was 0.3% per thermic cycle and 0.5 % per redox cycle. SEM pictures of the tested cells after thermic and redox cycles are presented and discussed.