Evaluation and optimization of Bi1-xSrxFeO 3-d perovskites as cathodes of solid oxide fuel cells
MetadataShow full item record
Lattice expansion behaviour, oxygen nonstoichiometry, mean iron oxidation state, electrical conductivity and interfacial polarization resistance of Bi1-xSrxFeO3-d were reported as a function of Sr-doping content for x = 0.3, 0.5 and 0.8. Among the series, Bi0.5Sr0.5FeO3-d (BSF5) demonstrates the optimum performance in terms of the lowest interfacial polarization resistance and the largest oxygen nonstoichiometry. It is demonstrated that the best microstructure and the lowest interfacial resistance can be obtained by firing BSF5 onto dense Sm0.2Ce0.8O1.9 (SDC) electrolyte at 1000°C. BSF5 exhibits good chemical compatibility with SDC; however, firing temperature above 1000 °C results in the formation of bismuth-deficient perovskite with inferior activity for oxygen reduction reaction. We also show that single-phase BSF5 cathode provides better electrode performance than its composite with SDC. This is due to the increased charge-transfer resistance upon adding SDC which have negligible electronic conductivity.
Showing items related by title, author, creator and subject.
Udo, Edet Ekpenyong (1991)Fifty three Staphylococcus aureus isolates were obtained from three centres, two hospitals and a private pathology laboratory, and studied for susceptibility to bacteriophages, resistance to antimicrobial agents and plasmid ...
Comparative genotype reactions to Sclerotinia sclerotiorum within breeding populations of Brassica napus and B. juncea from India and ChinaBarbetti, M.; Banga, S.; Fu, T.; Li, Y.; Singh, D.; Liu, S.; Ge, Cynthia; Banga, S. (2014)Twenty Brassica breeding populations derived from mass selection or inter-specific hybridization were field screened for resistance to three separate isolates of Sclerotinia sclerotiorum, the cause of Sclerotinia stem rot ...
Morgan, Dale (2007)Bacterial resistance to non-antibiotic agents is being increasingly studied. Plasmid-mediated resistance to cationic agents, which are important biocides, has been described in antibiotic-resistant Staphylococcus aureus. ...