Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Electrochemical Performance of LSCF Cathode with GDC lnterlayer on ScSZ Electrolyte

  • Hwang, Hae-Jin (School of Materials Science and Engineering, Inha University) ;
  • Moon, Ji-Woong (Korea Institute of Ceramic Engineering and Technology(KICET)) ;
  • Lim, Yongho (School of Materials Science and Engineering, Inha University, Korea Institute of Ceramic Engineering and Technology(KICET)) ;
  • Lee, Seunghun (School of Materials Science and Engineering, Inha University) ;
  • Lee, Eun-A (School of Materials Science and Engineering, Inha University)
  • Published : 2005.12.01
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Abstract

A symmetrical LSCF $(La_{0.6}Sr_{0.4}Co_{0.2}Fe_{0.8}O_{3-\delta})\;ScSZ(89ZrO_2-10Sc_2O_3-1CeO_2)/LSCF$ electrochemical cell with a GDC (Gadolinium-Doped Ceria, $90CeO_2-10Gd_2O_3$) interlayer that was inserted between the LSCF cathode and ScSZ electrolyte was fabricated, and the electrochemical performance of these cells was evaluated. The GDC interlayer was deposited on a ScSZ electrolyte using a screen-printing technique. The GDC interlayer prevented the unfavorable solid-state reactions at the LSCF/ScSZ interfaces. The LSCF cathode on the GDC interlayer had excellent electrocatalytic performance even at $650^{\circ}C$. The Area Specific Resistance (ASR) was strongly dependent on the thickness and heat-treatment temperature of the GDC interlayer. The impedance spectra showed that the cell with a $15\~27{\mu}m$ thick GDC interlayer heat-treated at $1200^{\circ}C$ had the lowest ASR.

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References

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