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Effect of B2O3–Bi2O3–PbO frit on the performance of LaBaCo2O5+δ cathode for intermediate-temperature solid oxide fuel cells
- Source :
-
International Journal of Hydrogen Energy . Nov2012, Vol. 37 Issue 21, p16117-16122. 6p. - Publication Year :
- 2012
-
Abstract
- Abstract: The effects of B2O3–Bi2O3–PbO (BBP) frit on the electrochemical performance, electrical conductivity, and thermal expansion of LaBaCo2O5+δ (LBCO) cathode were investigated. BBP frit was found to be effective in lowering the sintering temperature of LBCO cathode by about 200 °C and in improving its electrochemical performance within the intermediate-temperature range of 600–800 °C. LBCO with 5 wt.% BBP frit cathode based on Sm0.2Ce0.8O1.9 electrolyte showed the best electrochemical performance, i.e., the lowest area-specific resistance (ASR) and cathodic overpotential. The ASR values were about 64.1%, 66.1%, and 74.5% lower than those of LBCO at 700, 750, and 800 °C, respectively. The cathodic overpotential decreased from 51.0 mV for LBCO to 8.2 mV at a current density of 0.2 A cm−2 at 700 °C. The electrical conductivity of LBCO with 5 wt.% BBP frit was about 320–330 S cm−1 at 600–800 °C in air. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 37
- Issue :
- 21
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 82198767
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2012.08.043