Abstract
In order to develop a simple and cost-effective route to fabricate protonic ceramic membrane fuel cells (PCMFCs), a stable proton-conducting La 0.99Ca 0.01NbO 4 (LCN) thin electrolyte was fabricated on a porous NiO–La 0.5Ce 0.5O 1.75 (NiO–LDC) anode by in situ screen printing. The key part of this process is to directly print well-mixed ink of La 2O 3, CaCO 3 and Nb 2O 5 instead of pre-synthesized LCN ceramic powder on the anode substrate. After sintering at 1400 °C for 5 h, the full dense electrolyte membrane in the thickness of 20 μm was obtained. A single cell was assembled with (La 0.8Sr 0.2) 0.9MnO 3− δ –La 0.5Ce 0.5O 1.75 (LSM–LDC) as cathode and tested with humidified hydrogen as fuel and static air as oxidant. The open circuit voltage (OCV) and maximum power density respectively reached 0.98 V and 65 mW cm −2 at 800 °C. Interface resistance of cell under open circuit condition was also investigated.
Published Version
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