Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Characterization of Spherical NiO-YSZ Anode Composites for Solid Oxide Fuel Cells Synthesized by Ultrasonic Spray Pyrolysis

  • Lim, Chae-Hyun (Division of Advanced Materials Engineering, Chonbuk National University) ;
  • Lee, Ki-Tae (Hydrogen and Fuel Cell Research Center, Chonbuk National University)
  • Received : 2014.05.22
  • Accepted : 2014.06.30
  • Published : 2014.07.31
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Abstract

Spherical NiO-YSZ particles were synthesized by ultrasonic spray pyrolysis (USP). The morphology of the synthesized particles can be modified by controlling parameters such as precursor pH, carrier-gas flow-rate, and temperature of the heating zone. The synthesized spherical NiO-YSZ particles have rough surface morphology at high carrier-gas flow-rates due to rapid gas exhaustion and insufficient particle ordering. The Ni-YSZ cermet anode synthesized by ultrasonic spray pyrolysis at a flow rate of l L/min, with precursor solution at pH4, showed a higher maximum power density of 256 $mW/cm^2$ compared to a conventionally mixed Ni-YSZ anode (185 $mW/cm^2$) at $800^{\circ}C$. While the area-specific resistance of conventionally mixed Ni-YSZ anodes increases gradually with operation time (indicating performance degradation), the Ni-YSZ anode synthesized by USP does not exhibit any performance degradation, even after 500 h.

Keywords

References

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