Solid oxide electrolysis cells – current material development and industrial application

Abstract

Solid Oxide Electrolysis Cells (SOECs) have proven to be a highly efficient key technology for producing valuable chemicals and fuels from renewably generated electricity at temperatures between 600 °C and...

Controlled Pore Size of NiO-YSZ Tubular Substrate for Improved Performance of Reversible Solid Oxide Cell Using LaGaO3 Electrolyte Film

“…1, Ni is uniformly dispersed in Ni-YSZ substrate after 200 h operation, and so decrease in Ni content at interface between Ni-YSZ substrate and LSGM electrolyte was hardly observed, which is suggested on YSZ cell. 28 Since LSGM is good compatibility with Ni, no depression of Ni content at the interface between LSGM and Ni-YSZ substrate interface was observed during 200 h operation. At present, increase in ohmic loss during SOEC operation might be assigned to the change in contact between Ni and Ni particles in porous substrate by aggregation of Ni.…”

A Review on Critical Metals Used in Solid Oxide Cells for Power ↔ X Applications and Materials Recyclability

“…A composite of Ni and GDC shows better stability than Ni-8YSZ in partially oxidizing environments, however phase transition from Ni to NiO cannot be fully abated. Other electrodes being investigated for better performance and stability include (1) simple perovskites like lanthanum strontium titanates (LST), lanthanum strontium ferrites (LSF), nickel-doped LST and LS, (2) double perovskites like praseodymium barium cobaltite (PBC), strontium iron molybdate (SFM), 3D transition metal doped PBC and SFM, and (3) Ruddlesden-poppper types like lanthanum nickelate (LNO), praseodymium nickelate (PNO), iron-doped lanthanum/praseodymium nickelate. − …”

“…This successfully mitigates any oxygen build-up at the electrode/electrolyte interface. Other MIECs include barium strontium cobalt ferrite (BSCF), lanthanum strontium iron oxide, lanthanum strontium nickel cobaltite, etc. , The downside of these MIECs is their thermal expansion coefficient (TEC ∼ 13 × 10 –6 K –1 ) being far away from that of YSZ or ScSZ (TEC ∼ 10 × 10 –6 K –1 ). This discrepancy of TEC leads to electrode delamination at higher operating temperatures and affects long-term cell stability.…”

A new layered barium cobaltite electrode for protonic ceramic cells

“…2 Oxygen-electrode materials have been actively explored and optimised, with notable advancements achieved through oxygen-ion conducting electrolytes. 3–5 However, despite demonstrating favourable performance in SOCs, some materials cannot be directly employed in the protonic counterpart systems. This problem is mainly attributed to their chemical incompatibility with state-of-the-art barium-zirconate/cerate-based proton-conducting electrolytes, 6–10 which has led to the investigation of new compositions as a point of interest for PCCs.…”