Potassium doping optimization in proton-conducting Ba1-xKxCe0.6Zr0.2Y0.2O3-δ oxides for fuel cell applications

Sn–Dy–Cu Triply Doped BaZr0.1Ce0.7Y0.2O3−δ: A Chemically Stable and Highly Proton-Conductive Electrolyte for Low-Temperature Solid Oxide Fuel Cells

“…Relative densities and Vickers hardnesses of the BCSDCu samples were measured and are plotted in Figure S4c. Both of them present a tendency of first growing and then decreasing with the increase of temperature, which may be caused by the oversized grain originating from the excessive sintering temperature. − Considering the insufficient relative density of the BCSDCu sample sintered at 1250 °C, its related performance is not studied in the next section. Figure S4d shows the typical EIS of the BCSDCu samples for various average grain sizes tested at 250 °C in a humidified H 2 atmosphere.…”

Challenges and advancement in direct ammonia solid oxide fuel cells: a review

“…Moreover, they do not suffer from fuel dilution at the anode 95 and improve ammonia cracking by reducing the hydrogen-poisoning effect on Ni. 59,96 As an electrolyte, BaCeO 3 -based materials have been most widely studied, which includes BaCe 0.8 Y 0.2 O 3− δ , 97 BaCe 0.2 Zr 0.7 Y 0.1 O 3− δ , 98 Ba 0.9 K 0.1 Ce 0.6 Zr 0.2 Y 0.2 O 3− δ , 99 and Ba 0.8 Sr 0.2 Ce 0.6 Zr 0.2 Y 0.2 O 3− δ . 100 However, their ionic conductivities (∼0.01 S cm −1 ) are much less than typical oxide ion-conducting electrolytes like 8YSZ (∼0.05 S cm −1 ) and ScSZ (∼0.07 S cm −1 ), which limits their power densities and cell performance.…”