High sintering activity Cu-Gd co-doped CeO2 electrolyte for solid oxide fuel cells

Yingchao Dong*, Stuart Hampshire, Lin Bin, Yihan Ling, Xiaozhen Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Nano-sized Ce0.79Gd0.2Cu0.01O2-δ electrolyte powder was synthesized by the polyvinyl alcohol assisted combustion method, and then characterized by crystalline structure, powder morphology, sintering micro-structure and electrical properties. The results demonstrate that the as-synthesized Ce0.79Gd0.2Cu0.01O2-δ was well crystalline with cubic fluorite structure, and exhibited a porous foamy morphology composed of gas cavities and fine crystals ranging from 30 to 50 nm. After sintering at 1100 °C, the as-prepared pellets exhibited a dense and moderate-grained micro-structure with 95.54% relative density, suggesting that the synthesized Ce0.79Gd0.2Cu0.01O2-δ powder had high sintering activity. The powders made by this method are expected to offer potential application in intermediate-to-low temperature solid-oxide fuel cells, due to its very low densification sintering temperature (1100 °C), as well as high conductivity of 0.026 S cm-1 at 600 °C and good mechanical performance with three-point flexural strength value of 148.15 ± 2.42 MPa.

Original languageEnglish (US)
Pages (from-to)6510-6515
Number of pages6
JournalJournal of Power Sources
Volume195
Issue number19
DOIs
StatePublished - Oct 1 2010

Keywords

  • Ceria electrolyte
  • Combustion synthesis
  • Low-temperature sintering
  • Sintering aid CuO
  • Solid-oxide fuel cell

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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