Improved electrical properties of Nb doped BaCe0.9Y0.1O2.95 electrolyte for intermediate temperature SOFCs obtained by autocombustion method
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2014
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Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Nb doped BaCe0.9Y0.1O2.95 (BCY) powders were synthesized by both solid state reaction (SSR) and autocombustion reaction (ACR) method to investigate how different synthesis routes influence the properties of the powders and sintered samples. The powders were uniaxially pressed and sintered at 1550 degrees C to form dense electrolyte samples. Stability of BCY in CO2 can be increased by doping with Nb, but at the same time its electrical conductivities are reduced to a certain extent. It was shown that conductivities depended on both mechanism of defect formation, lattice parameters and microstructure of the electrolytes. Finer, less agglomerated powders were obtained by the method of autocombustion. SEM analysis revealed somewhat larger average grain size of the sintered samples synthesized by the ACR method. Total electrical conductivities were determined by electrochemical impedance spectroscopy (EIS) measurements in temperature range from 550 degrees C to 750 degrees C in a wet argon ...atmosphere. Again, higher conductivities were observed for the samples obtained by the ACR method and in some cases the relative difference in conductivity exceeds 20%. Thus, a certain improvement of electrolyte properties can be achieved by this method compared to the classical solid- state reaction route.
Ključne reči:
Ionic conduction / Fuel cells / Chemical synthesisIzvor:
Journal of Alloys and Compounds, 2014, 583, 278-284Izdavač:
- Elsevier Science Sa, Lausanne
Finansiranje / projekti:
- 0-3D nanostrukture za primenu u elektronici i obnovljivim izvorima energije: sinteza, karakterizacija i procesiranje (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45007)
DOI: 10.1016/j.jallcom.2013.08.189
ISSN: 0925-8388
WoS: 000326035200046
Scopus: 2-s2.0-84884478986
Institucija/grupa
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Radojković, Aleksandar AU - Savić, Slavica M. AU - Perać, Sanja AU - Branković, Zorica AU - Branković, Goran PY - 2014 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/762 AB - Nb doped BaCe0.9Y0.1O2.95 (BCY) powders were synthesized by both solid state reaction (SSR) and autocombustion reaction (ACR) method to investigate how different synthesis routes influence the properties of the powders and sintered samples. The powders were uniaxially pressed and sintered at 1550 degrees C to form dense electrolyte samples. Stability of BCY in CO2 can be increased by doping with Nb, but at the same time its electrical conductivities are reduced to a certain extent. It was shown that conductivities depended on both mechanism of defect formation, lattice parameters and microstructure of the electrolytes. Finer, less agglomerated powders were obtained by the method of autocombustion. SEM analysis revealed somewhat larger average grain size of the sintered samples synthesized by the ACR method. Total electrical conductivities were determined by electrochemical impedance spectroscopy (EIS) measurements in temperature range from 550 degrees C to 750 degrees C in a wet argon atmosphere. Again, higher conductivities were observed for the samples obtained by the ACR method and in some cases the relative difference in conductivity exceeds 20%. Thus, a certain improvement of electrolyte properties can be achieved by this method compared to the classical solid- state reaction route. PB - Elsevier Science Sa, Lausanne T2 - Journal of Alloys and Compounds T1 - Improved electrical properties of Nb doped BaCe0.9Y0.1O2.95 electrolyte for intermediate temperature SOFCs obtained by autocombustion method EP - 284 SP - 278 VL - 583 DO - 10.1016/j.jallcom.2013.08.189 ER -
@article{ author = "Radojković, Aleksandar and Savić, Slavica M. and Perać, Sanja and Branković, Zorica and Branković, Goran", year = "2014", abstract = "Nb doped BaCe0.9Y0.1O2.95 (BCY) powders were synthesized by both solid state reaction (SSR) and autocombustion reaction (ACR) method to investigate how different synthesis routes influence the properties of the powders and sintered samples. The powders were uniaxially pressed and sintered at 1550 degrees C to form dense electrolyte samples. Stability of BCY in CO2 can be increased by doping with Nb, but at the same time its electrical conductivities are reduced to a certain extent. It was shown that conductivities depended on both mechanism of defect formation, lattice parameters and microstructure of the electrolytes. Finer, less agglomerated powders were obtained by the method of autocombustion. SEM analysis revealed somewhat larger average grain size of the sintered samples synthesized by the ACR method. Total electrical conductivities were determined by electrochemical impedance spectroscopy (EIS) measurements in temperature range from 550 degrees C to 750 degrees C in a wet argon atmosphere. Again, higher conductivities were observed for the samples obtained by the ACR method and in some cases the relative difference in conductivity exceeds 20%. Thus, a certain improvement of electrolyte properties can be achieved by this method compared to the classical solid- state reaction route.", publisher = "Elsevier Science Sa, Lausanne", journal = "Journal of Alloys and Compounds", title = "Improved electrical properties of Nb doped BaCe0.9Y0.1O2.95 electrolyte for intermediate temperature SOFCs obtained by autocombustion method", pages = "284-278", volume = "583", doi = "10.1016/j.jallcom.2013.08.189" }
Radojković, A., Savić, S. M., Perać, S., Branković, Z.,& Branković, G.. (2014). Improved electrical properties of Nb doped BaCe0.9Y0.1O2.95 electrolyte for intermediate temperature SOFCs obtained by autocombustion method. in Journal of Alloys and Compounds Elsevier Science Sa, Lausanne., 583, 278-284. https://doi.org/10.1016/j.jallcom.2013.08.189
Radojković A, Savić SM, Perać S, Branković Z, Branković G. Improved electrical properties of Nb doped BaCe0.9Y0.1O2.95 electrolyte for intermediate temperature SOFCs obtained by autocombustion method. in Journal of Alloys and Compounds. 2014;583:278-284. doi:10.1016/j.jallcom.2013.08.189 .
Radojković, Aleksandar, Savić, Slavica M., Perać, Sanja, Branković, Zorica, Branković, Goran, "Improved electrical properties of Nb doped BaCe0.9Y0.1O2.95 electrolyte for intermediate temperature SOFCs obtained by autocombustion method" in Journal of Alloys and Compounds, 583 (2014):278-284, https://doi.org/10.1016/j.jallcom.2013.08.189 . .