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Fabrication and electrical properties of nanocrystalline Dy3+-doped CeO2 for intermediate-temperature solid oxide fuel cells

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  • Park, K.
  • Hwang, H.K.

Abstract

High-quality nano-sized Ce0.8Dy0.2O2−δ powders were synthesized by the solution combustion method, using C4H7NO4 (aspartic acid) as the combustion fuel. The nano-sized Ce0.8Dy0.2O2−δ powders provided an ultra-fine grain size and high density even at low sintering temperatures (1250–1400 °C), engendering high electrical conductivity. The magnitude of electrical conductivity depended strongly on the sintering temperature and followed the order of 1350 °C > 1300 °C > 1250 °C > 1400 °C. The electrical conductivity of the Ce0.8Dy0.2O2−δ sintered at 1350 °C was 0.206 S cm−1 at 800 °C. The high electrical conductivity can lower operating temperature of solid oxide fuel cells. We demonstrate that synthesizing nano-sized powders and controlling grain size are important for enhanced Ce0.8Dy0.2O2−δ electrolytes.

Suggested Citation

  • Park, K. & Hwang, H.K., 2013. "Fabrication and electrical properties of nanocrystalline Dy3+-doped CeO2 for intermediate-temperature solid oxide fuel cells," Energy, Elsevier, vol. 55(C), pages 304-309.
    • Handle: RePEc:eee:energy:v:55:y:2013:i:c:p:304-309
    DOI: 10.1016/j.energy.2013.04.017
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    1. Tamboli, Ashif H. & Chaugule, Avinash A. & Sheikh, Faheem A. & Chung, Wook-Jin & Kim, Hern, 2015. "Synthesis and application of CeO2–NiO loaded TiO2 nanofiber as novel catalyst for hydrogen production from sodium borohydride hydrolysis," Energy, Elsevier, vol. 89(C), pages 568-575.

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