Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Electrochemical Performance and Cr Tolerance in a La1-xBaxCo0.9Fe0.1O3-δ (x = 0.3, 0.4 and 0.5) Cathode for Solid Oxide Fuel Cells

  • Choe, Yeong-Ju (Departments of Materials Science and Engineering, Inha University) ;
  • Hwang, Hae-Jin (Departments of Materials Science and Engineering, Inha University)
  • Received : 2015.07.15
  • Accepted : 2015.08.12
  • Published : 2015.09.30
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Abstract

The electrochemical performance and Cr poisoning behavior of $La_{1-x}Ba_xCo_{0.9}Fe_{0.1}O_{3-{\delta}}$ (LBCF, x = 0.3, 0.4, 0.5) and $La_{0.6}Sr_{0.4}Co_{0.2}Fe_{0.8}O_{3-{\delta}}$ (LSCF) cathodes were investigated for solid oxide fuel cells (SOFCs). The polarization resistance of the LBCF/GDC/LBCF symmetrical cell was found to decrease with increasing Ba content (x value). This phenomenon might be associated with the high oxygen vacancy concentration in the LBCF sample, with x = 0.5. In addition, there was no chromium poisoning in the LBCF cathode. On the other hand, the polarization resistance of the LSCF cathode was found to significantly increase after exposure to gaseous chromium species; it appears that this result stemmed from the formation of $SrCrO_4$ phase. Therefore, it can be expected that LBCF can be a durable potential cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFC).

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References

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