Planar proton-conducting ceramic cells for hydrogen extraction: Mechanical properties, electrochemical performance and up-scaling

1 Proton-conducting ceramics 2 BaCe 0.2 Zr 0.7 Y 0.1 O 3-δ ceramics, which selectively separate H from any hydrogen-containing gas could play a role in the future of growing hydrogen market. In recent years, membrane technologies related to extraction became attractive solutions produce pressurized high-purity hydrogen. Yttrium-doped barium zirconate/cerate materials (BaCe x 1-x-y y ) are among most studied and used materials. this study, symmetrical cells consisting protonic electrolyte 0·2 0·7 0·1 (BCZY27), 10–15 μm thickness) surrounded by two cermet electrodes (BCZY27–Ni (50‒50 vol%), 150 μm) were prepared for applications. The via tape-casting co-sintered at 1575 °C. up-scaled an area 135 cm . fracture toughness was determined be 2.07 (±0.05) MPa · m 1/2 room temperature using double torsion technique. Impedance spectra recorded on between 650 800 °C 3% humidified 50% /50% N atmosphere varying partial pressure (20% < pH <100%). with demonstrated ohmic resistance 0.59 0.44 Ω cm, average electrode polarization 0.10 0.09 (per one electrode) °C, respectively. Moreover, stability test performed over 400 h highlighting stable electrochemical properties membranes. • study showed promising results large-scale development efficient PCC cells. Microstructural BCZY27 based studied. membranes BCZY27-Ni first time. An performances.