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

Abstract

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. La0.75Sr0.25Cr0.5Mn0.5O3-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% H2O and 40% CO2 at 750 °C. The anode-supported SOEC with LSM((La0.8Sr0.2)0.95Mn0.5O3-δ)/LSM-YSZ(Zr0.92Y0.08O2-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.