Degradation study of a reversible solid oxide cell (rSOC) short stack using distribution of relaxation times (DRT) analysis

Reversible solid oxide cells (rSOC) can convert excess electricity to valuable fuels in electrolysis cell mode (SOEC) and reverse the reaction fuel (SOFC). In this work, a five – rSOC short stack, integrating electrode (Ni-YSZ) supported (Ni-YSZ || YSZ | CGO LSC-CGO) with an active area of 100 cm2, is tested for cyclic durability. The gases H2/N2:50/50 H2/H2O:20/80 SOFC SOEC mode, respectively, are used during 35 reversible operations. voltage degradation 1.64% kh?1 0.65% steam utilisation 52%. post-cycle steady-state 0.74% suggests improved lifetime conditions. distribution relaxation times (DRT) analysis charge transfer through responsible observed degradation.