Fabrication of anode supported solid oxide electrolysis cell with the co-tape casting technique and study on co-electrolysis characteristics

Solid Oxide Electrolysis Cell (SOEC) is an efficient green hydrogen production technology, which is a reverse of Solid Oxide Fuel Cell (SOFC). In this paper, an anode-supported SOEC produced via multi-layer organic co-tape casting with co-sintering process is investigated for high temperature steam electrolysis , carbon dioxide electrolysis, and co-electrolysis. SOEC cathode must maintain its electrocatalytic activity in a high temperature and humidity condition. La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3-δ (LSCM) is one of the most promising cathode materials because of its superior electrocatalytic ability and redox stability. The anode-supported structure of electrolysis cell reduces ohmic resistance obviously and LSCM cathode exhibits good catalytic performance. To evaluate the performance of co-electrolysis, a continuous voltage of 1 V is applied for 256 h with 60% H 2 O and 40% CO 2 at 750 °C. The anode-supported SOEC with LSM((La 0.8 Sr 0.2 ) 0.95 Mn 0.5 O 3-δ )/LSM-YSZ(Zr 0.92 Y 0.08 O 2-δ )/YSZ/LSCM structure has good electrochemical performance and durability under co-electrolysis conditions combined with the distribution relaxation of time analysis of impedance spectra.