World class Innovative Novel Nanoscale Optimized Electrodes and Electrolytes for Electrochemical Reactions (WINNER) (completed)

• Navarrete, Laura; Almar, Laura; Tarach, Mateusz; Vøllestad, Einar; Mahmood, Asif & Catalán-Martinez, David [Show all 10 contributors for this article] (2025). Tailoring sintering properties of BaGd0.3La0.7Co2O6-δ steam electrodes for pressurized tubular proton-ceramic electrolysis cells. Journal of the European Ceramic Society. ISSN 0955-2219. 45(5), p. 1–8. doi: 10.1016/j.jeurceramsoc.2024.117162. Full text in Research Archive Show summary

  We herein address manufacturing constraints related to the high-temperature sintering step required for reaching adequate adhesion of oxygen/steam electrodes on proton ceramic electrolytes, particularly in tubular geometry. Incorporating various sintering aids such as Cu, Co, and Ni oxides improves the sinterability of the electrodes and reduces the sintering temperature to 950 °C. The ceramic-ceramic composite electrodes based on BaGd0.3La0.7Co2O6-δ (BGLC37) and BaZr0.7Ce0.2Y0.1O6-δ (BZCY) show good and robust electrode-electrolyte adhesion. Composite electrodes were tested under different operation conditions, i.e., temperatures and oxygen partial pressures in symmetrical cell configuration, achieving apparent polarisation resistances below 0.6 Ω·cm2 at 600 °C in wet air for all the electrodes with sintering aids. Finally, BGLC37/BZCY with 2 wt% of CuO electrodes were successfully applied on pre-reduced and sealed BZCY/Ni-supported tubular half-cells with 16 cm2 active area and measured in electrolysis mode at 600 °C and high steam pressure. The results open a route to manufacturing steam electrodes for large-scale electrolysis cells.

• Vøllestad, Einar (2023). Tubular protonic ceramic electrolysis cells and direct hydrogen compression. In Sitte, Werner & Merkle, Rotraut (Ed.), High-Temperature Electrolysis - From fundamentals to applications. IOP Publishing. ISSN 9780750339513. Full text in Research Archive

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• Småbråten, Didrik Rene (2024). Atomistic modelling of functional materials. Full text in Research Archive
• Småbråten, Didrik Rene; Polfus, Jonathan; Strandbakke, Ragnar; Singh, Kalpana; Veenstra, Peter & Fontaine, Marie-Laure (2023). DFT modelling of thermodynamic and kinetic parameters in electrochemical proton ceramic conducting cells. Full text in Research Archive
• Norby, Truls (2023). Transport in electrolytes and electrodes of proton ceramic electrochemical cells (PCECs). Full text in Research Archive
• Småbråten, Didrik Rene & Polfus, Jonathan (2023). DFT on electrodes for high-temperature electrolysis. Full text in Research Archive
• Singh, Kalpana; Norby, Truls & Strandbakke, Ragnar (2022). Effect of partial conductivities on the polarisation resistance of positrodes for proton ceramic fuel cells and electrolysers. Full text in Research Archive
• Rørvik, Per Martin & Denonville, Christelle (2022). Hydrogen og keramiske membraner. Full text in Research Archive

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