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

K. Park and H.K. Hwang

Energy, 2013, vol. 55, issue C, 304-309

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.

Keywords: Ceria; Fuel cells; Oxides; Sintering; Electrical transport (search for similar items in EconPapers)
Date: 2013
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:55:y:2013:i:c:p:304-309

DOI: 10.1016/j.energy.2013.04.017

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