Structure, sinterability, chemical stability and conductivity of proton-conducting BaZr0.6M0.2Y0.2O3-[delta] electrolyte membranes: The effect of the M dopant
MetadataShow full item record
BaZr0.8Y0.2O3 (BZY) may be one of the most promising proton conductors for hydrogen separation membranes and proton-conducting solid oxide fuel cells. Doping strategies have been widely applied to improve the sintering activity and conductivity of BZY ceramics. In this study, the phase structure, sinterability, chemical stability and conductivity of BaZr0.6M0.2Y0.2O3-d (BZMY) compositions with various M cations of Zr4+, Ce4+, Pr3+, Nd3+, Sm3+ and Gd3+ with different ionic radii were comparatively studied. All the rare-earth dopants could improve the sinterability of BZY. As the ionic radii of the dopants decreased, the oxides are more and more stable in the CO2 atmosphere. EIS results indicated that a greater ionic conductivity was achieved for BZMY with a larger M dopant. Among the various composites, BZNY and BZCY showed favorable protonic conductivity at 600 °C in a wet 10% H2–Ar atmosphere, with good sinterability and resistance to CO2 attack. A peak power density of 153 mW cm-2 was achieved at 700 °C with a fuel cell that contained BZCY as an electrolyte and BSCF as a cathode.
Showing items related by title, author, creator and subject.
Synthesis and characterization of lanthanum silicate oxyapatites co-doped with A (A = Ba, Sr, and Ca) and Fe for solid oxide fuel cellsCao, X.; Jiang, San Ping (2014)The co-doped lanthanum silicate oxyapatites, La9.5A0.5Si5.5Fe0.5O26.5 (A = Ba, Sr, and Ca), are synthesized by the high-temperature solid state reaction process. The phase formation and structure properties of undoped ...
Sinterability and conductivity of barium doped aluminium lanthanum oxyapatite La9.5Ba0.5Si5.5Al0.5O26.5 electrolyte of solid oxide fuel cellsCao, X.; Jiang, San Ping (2012)Apatite ceramics are interesting alternative solid oxide fuel cells (SOFCs) electrolytes because of their open structure for the transportation of oxide ions and their good chemical stability. This study reports the ...
Bilic, Ante; Gale, Julian (2007)First-principles calculations, based on density functional theory, are exploited to investigate the mechanisms and energetics of proton mobility in CaZrO3. The computations accurately reproduce the observed orthorhombic ...