Enhanced Power Stability for Proton Conducting Solid Oxides Fuel Cells. Calculated energy barriers for proton diffusion in Y-doped BaZrO3. Potential electrode materials for application in proton ceramic fuel cells. | |
Merinov, Boris ; Haile, Sossina ; III, William A. Goddard | |
California Institute of Technology | |
关键词: Electrocatalysts; Combustion; Diffusion; Cathodes; Nitrates; | |
DOI : 10.2172/876771 RP-ID : none RP-ID : FC26-02NT41631 RP-ID : 876771 |
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美国|英语 | |
来源: UNT Digital Library | |
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【 摘 要 】
A series of Quantum Mechanical (QM) calculations on Y-doped BaZrO{sub 3} (BYZ) periodic structures have been performed and calculated energy barriers for the intra-octahedra and inter-octahedra proton transfer have been found. The inter-octahedra proton transfer dominates in the BYZ electrolyte. Several potential cathode materials for the Y-doped BaZrO{sub 3} system were synthesized via glycine nitrate combustion method. Of the five potential cathode materials examined BaZr{sub 0.40}Pr{sub 0.40}Gd{sub 0.20}O{sub 3} and BaZr{sub 0.60}Y{sub 0.20}Co{sub 0.20}O{sub 3} appear to be the most promising for further applications in proton ceramic fuel cells (PCFCs). Potential anode electrocatalysts (metals) have been screened for reactivity with BaZr{sub 1-x}Y{sub x}O{sub 3-d}, fabrication compatibility, and chemical stability in fuel cell environment.
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876771.pdf | 226KB | ![]() |