Test and characterization of reversible solid oxide cells and stacks for innovative renewable energy storage

This work aims at developing a renewable energy storage solution, based on reversible solid oxide cell (rSOC) technology. Firstly, the initially high performing cells were tested as single with long-term SOFC/SOEC load cycles part of test sequence. Secondly, similar integrated in stack design optimized for operation degrees utilization. The tests showed significant degradation galvanostatic periods during electrolysis but not fuel mode prior to starting cycling part. diminished subsequent rSOC operating 700 °C, +0.6 (SOFC) and −1.2 A cm−2 (SOEC) utilization up 80 % both modes. conducted applying different switches between SOFC SOEC Initially, long duration (100 h each mode) performed pH2O/pH2: 50/50 investigate effect polarisation only. alternating cycle SOEC/SOFC was repeated over 1800 testing. Then switched daily from (8 pH2O/pH2 : 90/10 −0.84 cm−2) (16 H2 0.26 500 h. Stack included several thousands hours.