Effect of Sr on Sm-doped ceria electrolyte

Yifeng Zheng; Shoucheng He; Lin Ge; Ming Zhou; Han Chen; Lucun Guo

doi:10.1016/j.ijhydene.2011.01.042

Effect of Sr on Sm-doped ceria electrolyte

Yifeng Zheng, Shoucheng He, Lin Ge, Ming Zhou, Han Chen, Lucun Guo

材料科学与工程学院

Nanjing Tech University

科研成果: 期刊稿件 › 文章 › 同行评审

86 引用（Scopus）

摘要

The effect of Sr addition (0-10 mol%) on the densification, crystal structure, ionic conductivity, thermal expansion, and flexural strength of Ce_0.8Sm_0.2O_1.9 (SDC) was studied. Sr addition promotes densification and reduces sintering temperature by ∼100 °C. X-ray diffraction analysis showed that all the samples exhibit a fluorite structure. Impedance spectroscopy measurements indicated that SDC incorporated with an appropriate ratio of Sr (4-10 mol%) has higher ionic conductivity and lower activation energy compared with those of SDC. As the added amount of Sr increases by up to 6 mol% (0.94SDC-0.06Sr), the sample attains the highest ionic conductivity, about 30% higher than that of SDC at 700 °C. Moreover, flexural strength increases with Sr content, with the addition of 10 mol% Sr increasing the flexural strength of SDC from 97 to 160 MPa. In addition, thermal expansion is linear for all the samples. The addition of Sr does not appreciably change thermal expansion coefficient.

源语言	英语
页（从-至）	5128-5135
页数	8
期刊	International Journal of Hydrogen Energy
卷	36
期	8
DOI	https://doi.org/10.1016/j.ijhydene.2011.01.042
出版状态	已出版 - 4月 2011

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title = "Effect of Sr on Sm-doped ceria electrolyte",

abstract = "The effect of Sr addition (0-10 mol%) on the densification, crystal structure, ionic conductivity, thermal expansion, and flexural strength of Ce0.8Sm0.2O1.9 (SDC) was studied. Sr addition promotes densification and reduces sintering temperature by ∼100 °C. X-ray diffraction analysis showed that all the samples exhibit a fluorite structure. Impedance spectroscopy measurements indicated that SDC incorporated with an appropriate ratio of Sr (4-10 mol%) has higher ionic conductivity and lower activation energy compared with those of SDC. As the added amount of Sr increases by up to 6 mol% (0.94SDC-0.06Sr), the sample attains the highest ionic conductivity, about 30% higher than that of SDC at 700 °C. Moreover, flexural strength increases with Sr content, with the addition of 10 mol% Sr increasing the flexural strength of SDC from 97 to 160 MPa. In addition, thermal expansion is linear for all the samples. The addition of Sr does not appreciably change thermal expansion coefficient.",

keywords = "Crystal structure, Flexural strength, Fuel cells, Ionic conductivity, Sintering, Thermal expansion",

author = "Yifeng Zheng and Shoucheng He and Lin Ge and Ming Zhou and Han Chen and Lucun Guo",

year = "2011",

month = apr,

doi = "10.1016/j.ijhydene.2011.01.042",

language = "英语",

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journal = "International Journal of Hydrogen Energy",

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TY - JOUR

T1 - Effect of Sr on Sm-doped ceria electrolyte

AU - Zheng, Yifeng

AU - He, Shoucheng

AU - Ge, Lin

AU - Zhou, Ming

AU - Chen, Han

AU - Guo, Lucun

PY - 2011/4

Y1 - 2011/4

N2 - The effect of Sr addition (0-10 mol%) on the densification, crystal structure, ionic conductivity, thermal expansion, and flexural strength of Ce0.8Sm0.2O1.9 (SDC) was studied. Sr addition promotes densification and reduces sintering temperature by ∼100 °C. X-ray diffraction analysis showed that all the samples exhibit a fluorite structure. Impedance spectroscopy measurements indicated that SDC incorporated with an appropriate ratio of Sr (4-10 mol%) has higher ionic conductivity and lower activation energy compared with those of SDC. As the added amount of Sr increases by up to 6 mol% (0.94SDC-0.06Sr), the sample attains the highest ionic conductivity, about 30% higher than that of SDC at 700 °C. Moreover, flexural strength increases with Sr content, with the addition of 10 mol% Sr increasing the flexural strength of SDC from 97 to 160 MPa. In addition, thermal expansion is linear for all the samples. The addition of Sr does not appreciably change thermal expansion coefficient.

AB - The effect of Sr addition (0-10 mol%) on the densification, crystal structure, ionic conductivity, thermal expansion, and flexural strength of Ce0.8Sm0.2O1.9 (SDC) was studied. Sr addition promotes densification and reduces sintering temperature by ∼100 °C. X-ray diffraction analysis showed that all the samples exhibit a fluorite structure. Impedance spectroscopy measurements indicated that SDC incorporated with an appropriate ratio of Sr (4-10 mol%) has higher ionic conductivity and lower activation energy compared with those of SDC. As the added amount of Sr increases by up to 6 mol% (0.94SDC-0.06Sr), the sample attains the highest ionic conductivity, about 30% higher than that of SDC at 700 °C. Moreover, flexural strength increases with Sr content, with the addition of 10 mol% Sr increasing the flexural strength of SDC from 97 to 160 MPa. In addition, thermal expansion is linear for all the samples. The addition of Sr does not appreciably change thermal expansion coefficient.

KW - Crystal structure

KW - Flexural strength

KW - Fuel cells

KW - Ionic conductivity

KW - Sintering

KW - Thermal expansion

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U2 - 10.1016/j.ijhydene.2011.01.042

DO - 10.1016/j.ijhydene.2011.01.042

M3 - 文章

AN - SCOPUS:79953666127

SN - 0360-3199

VL - 36

SP - 5128

EP - 5135

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 8

ER -

Effect of Sr on Sm-doped ceria electrolyte

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