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

• Navarrete, Laura; Almar, Laura; Tarach, Mateusz; Vøllestad, Einar; Mahmood, Asif & Catalán-Martinez, David [Vis alle 10 forfattere av denne artikkelen] (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), s. 1–8. doi: 10.1016/j.jeurceramsoc.2024.117162. Fulltekst i vitenarkiv Vis sammendrag

  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. I Sitte, Werner & Merkle, Rotraut (Red.), High-Temperature Electrolysis - From fundamentals to applications. IOP Publishing. ISSN 9780750339513. Fulltekst i vitenarkiv

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