Alkaline earth metal and samarium co-doped ceria as efficient electrolytes

Amjad Ali; Rizwan Raza; M. Kaleem Ullah; Asia Rafique; Baoyuan Wang; Bin Zhu

doi:10.1063/1.5005824

Alkaline earth metal and samarium co-doped ceria as efficient electrolytes

Amjad Ali
, Rizwan Raza
, M. Kaleem Ullah
, Asia Rafique
, Baoyuan Wang
, Bin Zhu

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

39 Scopus citations

Abstract

Co-doped ceramic electrolytes M_0.1Sm_0.1Ce_0.8O_2-δ (M = Ba, Ca, Mg, and Sr) were synthesized via co-precipitation. The focus of this study was to highlight the effects of alkaline earth metals in doped ceria on the microstructure, densification, conductivity, and performance. The ionic conductivity comparisons of prepared electrolytes in the air atmosphere were studied. It has been observed that Ca_0.1Sm_0.1Ce_0.8O_2-δ shows the highest conductivity of 0.124 Scm^-1 at 650 °C and a lower activation energy of 0.48 eV. The cell shows a maximum power density of 630 mW cm^-2 at 650 °C using hydrogen fuel. The enhancement in conductivity and performance was due to increasing the oxygen vacancies in the ceria lattice with the increasing dopant concentration. The bandgap was calculated from UV-Vis data, which shows a red shift when compared with pure ceria. The average crystallite size is in the range of 37-49 nm. DFT was used to analyze the co-doping structure, and the calculated lattice parameter was compared with the experimental lattice parameter.

Original language	English
Article number	043902
Journal	Applied Physics Letters
Volume	112
Issue number	4
DOIs	https://doi.org/10.1063/1.5005824
State	Published - 22 Jan 2018
Externally published	Yes

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title = "Alkaline earth metal and samarium co-doped ceria as efficient electrolytes",

abstract = "Co-doped ceramic electrolytes M0.1Sm0.1Ce0.8O2-δ (M = Ba, Ca, Mg, and Sr) were synthesized via co-precipitation. The focus of this study was to highlight the effects of alkaline earth metals in doped ceria on the microstructure, densification, conductivity, and performance. The ionic conductivity comparisons of prepared electrolytes in the air atmosphere were studied. It has been observed that Ca0.1Sm0.1Ce0.8O2-δ shows the highest conductivity of 0.124 Scm-1 at 650 °C and a lower activation energy of 0.48 eV. The cell shows a maximum power density of 630 mW cm-2 at 650 °C using hydrogen fuel. The enhancement in conductivity and performance was due to increasing the oxygen vacancies in the ceria lattice with the increasing dopant concentration. The bandgap was calculated from UV-Vis data, which shows a red shift when compared with pure ceria. The average crystallite size is in the range of 37-49 nm. DFT was used to analyze the co-doping structure, and the calculated lattice parameter was compared with the experimental lattice parameter.",

author = "Amjad Ali and Rizwan Raza and \{Kaleem Ullah\}, M. and Asia Rafique and Baoyuan Wang and Bin Zhu",

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day = "22",

doi = "10.1063/1.5005824",

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T1 - Alkaline earth metal and samarium co-doped ceria as efficient electrolytes

AU - Ali, Amjad

AU - Raza, Rizwan

AU - Kaleem Ullah, M.

AU - Rafique, Asia

AU - Wang, Baoyuan

AU - Zhu, Bin

PY - 2018/1/22

Y1 - 2018/1/22

N2 - Co-doped ceramic electrolytes M0.1Sm0.1Ce0.8O2-δ (M = Ba, Ca, Mg, and Sr) were synthesized via co-precipitation. The focus of this study was to highlight the effects of alkaline earth metals in doped ceria on the microstructure, densification, conductivity, and performance. The ionic conductivity comparisons of prepared electrolytes in the air atmosphere were studied. It has been observed that Ca0.1Sm0.1Ce0.8O2-δ shows the highest conductivity of 0.124 Scm-1 at 650 °C and a lower activation energy of 0.48 eV. The cell shows a maximum power density of 630 mW cm-2 at 650 °C using hydrogen fuel. The enhancement in conductivity and performance was due to increasing the oxygen vacancies in the ceria lattice with the increasing dopant concentration. The bandgap was calculated from UV-Vis data, which shows a red shift when compared with pure ceria. The average crystallite size is in the range of 37-49 nm. DFT was used to analyze the co-doping structure, and the calculated lattice parameter was compared with the experimental lattice parameter.

AB - Co-doped ceramic electrolytes M0.1Sm0.1Ce0.8O2-δ (M = Ba, Ca, Mg, and Sr) were synthesized via co-precipitation. The focus of this study was to highlight the effects of alkaline earth metals in doped ceria on the microstructure, densification, conductivity, and performance. The ionic conductivity comparisons of prepared electrolytes in the air atmosphere were studied. It has been observed that Ca0.1Sm0.1Ce0.8O2-δ shows the highest conductivity of 0.124 Scm-1 at 650 °C and a lower activation energy of 0.48 eV. The cell shows a maximum power density of 630 mW cm-2 at 650 °C using hydrogen fuel. The enhancement in conductivity and performance was due to increasing the oxygen vacancies in the ceria lattice with the increasing dopant concentration. The bandgap was calculated from UV-Vis data, which shows a red shift when compared with pure ceria. The average crystallite size is in the range of 37-49 nm. DFT was used to analyze the co-doping structure, and the calculated lattice parameter was compared with the experimental lattice parameter.

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U2 - 10.1063/1.5005824

DO - 10.1063/1.5005824

M3 - 文章

AN - SCOPUS:85041125633

SN - 0003-6951

VL - 112

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 4

M1 - 043902

ER -

Alkaline earth metal and samarium co-doped ceria as efficient electrolytes

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