Combustion synthesis and characterization of Cu-Sm co-doped CeO2 electrolytes

Yingchao Dong; Stuart Hampshire; Jian er Zhou; Xinfa Dong; Bin Lin; Guangyao Meng

doi:10.1016/j.jeurceramsoc.2011.04.037

Combustion synthesis and characterization of Cu-Sm co-doped CeO₂ electrolytes

Yingchao Dong^*, Stuart Hampshire, Jian er Zhou, Xinfa Dong, Bin Lin, Guangyao Meng

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Nano-sized CSO (Ce_0.80Sm_0.20O_2-δ) and CSCO (Ce_0.79Sm_0.20Cu_0.01 O_2-δ) were synthesized by the PVA assisted combustion method, and then characterized by the structure of PVA-cation complexes and nano-powders, as well as mechanical and electrical performance after sintering. The results indicate that the PVA-cation complexes (PVA-(Ce³⁺,Sm³⁺) and PVA-(Ce³⁺,Sm³⁺,Cu²⁺)) were formed by coordinating metal cations to hydroxyl groups, as well as the COO^-1 group derived from the oxidation of PVA with NO₃^-1. Low temperatures (around 200°C) caused intense combustion reactions, resulting in the direct crystallization of cubic fluorite nano-CSO (10-20nm) and nano-CSCO (10-15nm) crystals with homogeneous element distribution. This slight compositional modification of CSO by co-doping with 1mol% CuO resulted in a significantly lowered densification temperature, as well as enhanced mechanical and electrical property. The strength improvement can be ascribed to the dense and fine-grained microstructure without normal grain coarsening, resulting in a transgranular-dominant fracture mode during strength testing.

Original language	English (US)
Pages (from-to)	2365-2376
Number of pages	12
Journal	Journal of the European Ceramic Society
Volume	31
Issue number	13
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2011.04.037
State	Published - Nov 2011
Externally published	Yes

Bibliographical note

Funding Information:
The authors wish to thank the Irish Research Council for Science, Engineering and Technology through an EMPOWER Post-doctoral Fellowship (YD) and China Post-Doctoral Grant Scheme (contract no. 20100470846) for finance support.

Keywords

Ceria electrolyte
Co-doping
Combustion synthesis
Low-temperature sintering
Mechanical and electrical properties
Solid oxide fuel cell

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1016/j.jeurceramsoc.2011.04.037

Cite this

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title = "Combustion synthesis and characterization of Cu-Sm co-doped CeO2 electrolytes",

abstract = "Nano-sized CSO (Ce0.80Sm0.20O2-δ) and CSCO (Ce0.79Sm0.20Cu0.01 O2-δ) were synthesized by the PVA assisted combustion method, and then characterized by the structure of PVA-cation complexes and nano-powders, as well as mechanical and electrical performance after sintering. The results indicate that the PVA-cation complexes (PVA-(Ce3+,Sm3+) and PVA-(Ce3+,Sm3+,Cu2+)) were formed by coordinating metal cations to hydroxyl groups, as well as the COO-1 group derived from the oxidation of PVA with NO3-1. Low temperatures (around 200°C) caused intense combustion reactions, resulting in the direct crystallization of cubic fluorite nano-CSO (10-20nm) and nano-CSCO (10-15nm) crystals with homogeneous element distribution. This slight compositional modification of CSO by co-doping with 1mol% CuO resulted in a significantly lowered densification temperature, as well as enhanced mechanical and electrical property. The strength improvement can be ascribed to the dense and fine-grained microstructure without normal grain coarsening, resulting in a transgranular-dominant fracture mode during strength testing.",

keywords = "Ceria electrolyte, Co-doping, Combustion synthesis, Low-temperature sintering, Mechanical and electrical properties, Solid oxide fuel cell",

author = "Yingchao Dong and Stuart Hampshire and Zhou, {Jian er} and Xinfa Dong and Bin Lin and Guangyao Meng",

note = "Funding Information: The authors wish to thank the Irish Research Council for Science, Engineering and Technology through an EMPOWER Post-doctoral Fellowship (YD) and China Post-Doctoral Grant Scheme (contract no. 20100470846) for finance support.",

year = "2011",

month = nov,

doi = "10.1016/j.jeurceramsoc.2011.04.037",

language = "English (US)",

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T1 - Combustion synthesis and characterization of Cu-Sm co-doped CeO2 electrolytes

AU - Dong, Yingchao

AU - Hampshire, Stuart

AU - Zhou, Jian er

AU - Dong, Xinfa

AU - Lin, Bin

AU - Meng, Guangyao

N1 - Funding Information: The authors wish to thank the Irish Research Council for Science, Engineering and Technology through an EMPOWER Post-doctoral Fellowship (YD) and China Post-Doctoral Grant Scheme (contract no. 20100470846) for finance support.

PY - 2011/11

Y1 - 2011/11

N2 - Nano-sized CSO (Ce0.80Sm0.20O2-δ) and CSCO (Ce0.79Sm0.20Cu0.01 O2-δ) were synthesized by the PVA assisted combustion method, and then characterized by the structure of PVA-cation complexes and nano-powders, as well as mechanical and electrical performance after sintering. The results indicate that the PVA-cation complexes (PVA-(Ce3+,Sm3+) and PVA-(Ce3+,Sm3+,Cu2+)) were formed by coordinating metal cations to hydroxyl groups, as well as the COO-1 group derived from the oxidation of PVA with NO3-1. Low temperatures (around 200°C) caused intense combustion reactions, resulting in the direct crystallization of cubic fluorite nano-CSO (10-20nm) and nano-CSCO (10-15nm) crystals with homogeneous element distribution. This slight compositional modification of CSO by co-doping with 1mol% CuO resulted in a significantly lowered densification temperature, as well as enhanced mechanical and electrical property. The strength improvement can be ascribed to the dense and fine-grained microstructure without normal grain coarsening, resulting in a transgranular-dominant fracture mode during strength testing.

AB - Nano-sized CSO (Ce0.80Sm0.20O2-δ) and CSCO (Ce0.79Sm0.20Cu0.01 O2-δ) were synthesized by the PVA assisted combustion method, and then characterized by the structure of PVA-cation complexes and nano-powders, as well as mechanical and electrical performance after sintering. The results indicate that the PVA-cation complexes (PVA-(Ce3+,Sm3+) and PVA-(Ce3+,Sm3+,Cu2+)) were formed by coordinating metal cations to hydroxyl groups, as well as the COO-1 group derived from the oxidation of PVA with NO3-1. Low temperatures (around 200°C) caused intense combustion reactions, resulting in the direct crystallization of cubic fluorite nano-CSO (10-20nm) and nano-CSCO (10-15nm) crystals with homogeneous element distribution. This slight compositional modification of CSO by co-doping with 1mol% CuO resulted in a significantly lowered densification temperature, as well as enhanced mechanical and electrical property. The strength improvement can be ascribed to the dense and fine-grained microstructure without normal grain coarsening, resulting in a transgranular-dominant fracture mode during strength testing.

KW - Ceria electrolyte

KW - Co-doping

KW - Combustion synthesis

KW - Low-temperature sintering

KW - Mechanical and electrical properties

KW - Solid oxide fuel cell

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