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High sintering activity Cu–Gd co-doped CeO2 electrolyte for solid oxide fuel cells
- Source :
-
Journal of Power Sources . Oct2010, Vol. 195 Issue 19, p6510-6515. 6p. - Publication Year :
- 2010
-
Abstract
- 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 50nm. 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 0.026Scm−1 at 600°C and good mechanical performance with three-point flexural strength value of 148.15±2.42MPa. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 03787753
- Volume :
- 195
- Issue :
- 19
- Database :
- Academic Search Index
- Journal :
- Journal of Power Sources
- Publication Type :
- Academic Journal
- Accession number :
- 51294028
- Full Text :
- https://doi.org/10.1016/j.jpowsour.2010.03.053