Synthesis and characterization of Ba0.6Sr0.4Ce 0.8-xZrxY0.2O3- δ proton-conducting oxides for use as fuel cell electrolyte

Sheng Wei Lee; Chung Jen Tseng; Jeng Kuei Chang; Kan Rong Lee; Chia Tzu Chen; I. Ming Hung; Sheng Long Lee; Jing Chie Lin

doi:10.1016/j.jallcom.2013.01.101

Synthesis and characterization of Ba_0.6Sr_0.4Ce _0.8-xZr_xY_0.2O_3- _δ proton-conducting oxides for use as fuel cell electrolyte

Sheng Wei Lee, Chung Jen Tseng, Jeng Kuei Chang, Kan Rong Lee, Chia Tzu Chen, I. Ming Hung, Sheng Long Lee, Jing Chie Lin

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

17 Scopus citations

Abstract

Ba_0.6Sr_0.4Ce_0.8-xZr _xY_0.2O_3-δ (x = 0-0.8) proton-conducting oxides are prepared using a sol-gel complexing process. The effects of the Ce/Zr ratio on various material properties are systematically investigated. The sintered samples show a perovskite crystal structure without impurity phases and have a rather compact interior, making them suitable for use as a fuel cell electrolyte. Increasing the Zr content in the oxides causes lattice constriction and suppresses grain growth during sintering at 1600 C. The ionic conductivity of the oxides increases with increasing Ce/Zr ratio. At 800 C, Ba_0.6Sr_0.4Ce_0.8Y_0.2O _3-δ has a conductivity of as high as 0.14 S/cm. However, X-ray diffraction and Raman spectroscopy evaluations show that this oxide cannot withstand a CO₂ atmosphere. A suitable substitution of Ce with Zr in the structure significantly improves the chemical stability of the oxide without significantly degrading conductivity.

Original language	English
Pages (from-to)	S506-S510
Journal	Journal of Alloys and Compounds
Volume	586
Issue number	SUPPL. 1
DOIs	https://doi.org/10.1016/j.jallcom.2013.01.101
State	Published - 2014

Keywords

A. Energy storage materials
B. Sol-gel synthesis
C. Scanning and transmission electron microscopy
C. X-ray diffraction
D. Ionic conduction

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10.1016/j.jallcom.2013.01.101

Cite this

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title = "Synthesis and characterization of Ba0.6Sr0.4Ce 0.8-xZrxY0.2O3- δ proton-conducting oxides for use as fuel cell electrolyte",

abstract = "Ba0.6Sr0.4Ce0.8-xZr xY0.2O3-δ (x = 0-0.8) proton-conducting oxides are prepared using a sol-gel complexing process. The effects of the Ce/Zr ratio on various material properties are systematically investigated. The sintered samples show a perovskite crystal structure without impurity phases and have a rather compact interior, making them suitable for use as a fuel cell electrolyte. Increasing the Zr content in the oxides causes lattice constriction and suppresses grain growth during sintering at 1600 C. The ionic conductivity of the oxides increases with increasing Ce/Zr ratio. At 800 C, Ba0.6Sr0.4Ce0.8Y0.2O 3-δ has a conductivity of as high as 0.14 S/cm. However, X-ray diffraction and Raman spectroscopy evaluations show that this oxide cannot withstand a CO2 atmosphere. A suitable substitution of Ce with Zr in the structure significantly improves the chemical stability of the oxide without significantly degrading conductivity.",

keywords = "A. Energy storage materials, B. Sol-gel synthesis, C. Scanning and transmission electron microscopy, C. X-ray diffraction, D. Ionic conduction",

author = "Lee, {Sheng Wei} and Tseng, {Chung Jen} and Chang, {Jeng Kuei} and Lee, {Kan Rong} and Chen, {Chia Tzu} and Hung, {I. Ming} and Lee, {Sheng Long} and Lin, {Jing Chie}",

note = "Funding Information: The financial support of this work by the National Science Council of Taiwan under Grant NSC 101-3113-P-008-006 is gratefully appreciated.",

year = "2014",

doi = "10.1016/j.jallcom.2013.01.101",

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volume = "586",

pages = "S506--S510",

journal = "Journal of Alloys and Compounds",

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TY - JOUR

T1 - Synthesis and characterization of Ba0.6Sr0.4Ce 0.8-xZrxY0.2O3- δ proton-conducting oxides for use as fuel cell electrolyte

AU - Lee, Sheng Wei

AU - Tseng, Chung Jen

AU - Chang, Jeng Kuei

AU - Lee, Kan Rong

AU - Chen, Chia Tzu

AU - Hung, I. Ming

AU - Lee, Sheng Long

AU - Lin, Jing Chie

N1 - Funding Information: The financial support of this work by the National Science Council of Taiwan under Grant NSC 101-3113-P-008-006 is gratefully appreciated.

PY - 2014

Y1 - 2014

N2 - Ba0.6Sr0.4Ce0.8-xZr xY0.2O3-δ (x = 0-0.8) proton-conducting oxides are prepared using a sol-gel complexing process. The effects of the Ce/Zr ratio on various material properties are systematically investigated. The sintered samples show a perovskite crystal structure without impurity phases and have a rather compact interior, making them suitable for use as a fuel cell electrolyte. Increasing the Zr content in the oxides causes lattice constriction and suppresses grain growth during sintering at 1600 C. The ionic conductivity of the oxides increases with increasing Ce/Zr ratio. At 800 C, Ba0.6Sr0.4Ce0.8Y0.2O 3-δ has a conductivity of as high as 0.14 S/cm. However, X-ray diffraction and Raman spectroscopy evaluations show that this oxide cannot withstand a CO2 atmosphere. A suitable substitution of Ce with Zr in the structure significantly improves the chemical stability of the oxide without significantly degrading conductivity.

AB - Ba0.6Sr0.4Ce0.8-xZr xY0.2O3-δ (x = 0-0.8) proton-conducting oxides are prepared using a sol-gel complexing process. The effects of the Ce/Zr ratio on various material properties are systematically investigated. The sintered samples show a perovskite crystal structure without impurity phases and have a rather compact interior, making them suitable for use as a fuel cell electrolyte. Increasing the Zr content in the oxides causes lattice constriction and suppresses grain growth during sintering at 1600 C. The ionic conductivity of the oxides increases with increasing Ce/Zr ratio. At 800 C, Ba0.6Sr0.4Ce0.8Y0.2O 3-δ has a conductivity of as high as 0.14 S/cm. However, X-ray diffraction and Raman spectroscopy evaluations show that this oxide cannot withstand a CO2 atmosphere. A suitable substitution of Ce with Zr in the structure significantly improves the chemical stability of the oxide without significantly degrading conductivity.

KW - A. Energy storage materials

KW - B. Sol-gel synthesis

KW - C. Scanning and transmission electron microscopy

KW - C. X-ray diffraction

KW - D. Ionic conduction

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U2 - 10.1016/j.jallcom.2013.01.101

DO - 10.1016/j.jallcom.2013.01.101

M3 - 期刊論文

AN - SCOPUS:84888883931

SN - 0925-8388

VL - 586

SP - S506-S510

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - SUPPL. 1