Effect of Ca2+ and Zn2+ cations substitution on the properties of La0.85Sr0.15CrO3 as SOFC interconnect

Xiaofang Zhu; Haitao Gu; Han Chen; Yifeng Zheng; Lucun Guo

doi:10.1016/j.jallcom.2009.02.095

Effect of Ca²⁺ and Zn²⁺ cations substitution on the properties of La_0.85Sr_0.15CrO₃ as SOFC interconnect

Xiaofang Zhu, Haitao Gu, Han Chen, Yifeng Zheng, Lucun Guo

College of Materials Science and Engineering

Nanjing Tech University

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

10 Scopus citations

Abstract

The effect of Ca²⁺ and Zn²⁺ cations substitution on the sinterability, thermal expansion and electrical properties of La_0.85Sr_0.15-xCa_xCr_1-yZn_yO₃ as solid oxide fuel cell (SOFC) interconnect materials was investigated. The results showed that the bulk densities of La_0.85Sr_0.15-xCa_xCrO₃ increased with increasing Ca content and a maximum electrical conductivity value of 20.1 S/cm at 800 °C was obtained when x = 0.05. The transition metal Zn substituted in Cr-site further optimized the sinterability and increased the bulk density by 25% when Zn content was up to 0.09. The La_0.85Sr_0.1Ca_0.05Cr_0.91Zn_0.09O₃ sample exhibited an electrical conductivity of 21.5 S/cm at 800 °C and a thermal expansion coefficient (TEC) of 10.3 × 10^-6 K^-1 (20-800 °C), which is compatible with that of 8 mol.%-Y₂O₃-stabilized-ZrO₂ (8YSZ) electrolyte.

Original language	English
Pages (from-to)	958-961
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	480
Issue number	2
DOIs	https://doi.org/10.1016/j.jallcom.2009.02.095
State	Published - 8 Jul 2009

Keywords

Electrical conductivity
Interconnect
SOFC
Sinterability
TEC

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10.1016/j.jallcom.2009.02.095

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title = "Effect of Ca2+ and Zn2+ cations substitution on the properties of La0.85Sr0.15CrO3 as SOFC interconnect",

abstract = "The effect of Ca2+ and Zn2+ cations substitution on the sinterability, thermal expansion and electrical properties of La0.85Sr0.15-xCaxCr1-yZnyO3 as solid oxide fuel cell (SOFC) interconnect materials was investigated. The results showed that the bulk densities of La0.85Sr0.15-xCaxCrO3 increased with increasing Ca content and a maximum electrical conductivity value of 20.1 S/cm at 800 °C was obtained when x = 0.05. The transition metal Zn substituted in Cr-site further optimized the sinterability and increased the bulk density by 25% when Zn content was up to 0.09. The La0.85Sr0.1Ca0.05Cr0.91Zn0.09O3 sample exhibited an electrical conductivity of 21.5 S/cm at 800 °C and a thermal expansion coefficient (TEC) of 10.3 × 10-6 K-1 (20-800 °C), which is compatible with that of 8 mol.%-Y2O3-stabilized-ZrO2 (8YSZ) electrolyte.",

keywords = "Electrical conductivity, Interconnect, SOFC, Sinterability, TEC",

author = "Xiaofang Zhu and Haitao Gu and Han Chen and Yifeng Zheng and Lucun Guo",

year = "2009",

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doi = "10.1016/j.jallcom.2009.02.095",

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volume = "480",

pages = "958--961",

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T1 - Effect of Ca2+ and Zn2+ cations substitution on the properties of La0.85Sr0.15CrO3 as SOFC interconnect

AU - Zhu, Xiaofang

AU - Gu, Haitao

AU - Chen, Han

AU - Zheng, Yifeng

AU - Guo, Lucun

PY - 2009/7/8

Y1 - 2009/7/8

N2 - The effect of Ca2+ and Zn2+ cations substitution on the sinterability, thermal expansion and electrical properties of La0.85Sr0.15-xCaxCr1-yZnyO3 as solid oxide fuel cell (SOFC) interconnect materials was investigated. The results showed that the bulk densities of La0.85Sr0.15-xCaxCrO3 increased with increasing Ca content and a maximum electrical conductivity value of 20.1 S/cm at 800 °C was obtained when x = 0.05. The transition metal Zn substituted in Cr-site further optimized the sinterability and increased the bulk density by 25% when Zn content was up to 0.09. The La0.85Sr0.1Ca0.05Cr0.91Zn0.09O3 sample exhibited an electrical conductivity of 21.5 S/cm at 800 °C and a thermal expansion coefficient (TEC) of 10.3 × 10-6 K-1 (20-800 °C), which is compatible with that of 8 mol.%-Y2O3-stabilized-ZrO2 (8YSZ) electrolyte.

AB - The effect of Ca2+ and Zn2+ cations substitution on the sinterability, thermal expansion and electrical properties of La0.85Sr0.15-xCaxCr1-yZnyO3 as solid oxide fuel cell (SOFC) interconnect materials was investigated. The results showed that the bulk densities of La0.85Sr0.15-xCaxCrO3 increased with increasing Ca content and a maximum electrical conductivity value of 20.1 S/cm at 800 °C was obtained when x = 0.05. The transition metal Zn substituted in Cr-site further optimized the sinterability and increased the bulk density by 25% when Zn content was up to 0.09. The La0.85Sr0.1Ca0.05Cr0.91Zn0.09O3 sample exhibited an electrical conductivity of 21.5 S/cm at 800 °C and a thermal expansion coefficient (TEC) of 10.3 × 10-6 K-1 (20-800 °C), which is compatible with that of 8 mol.%-Y2O3-stabilized-ZrO2 (8YSZ) electrolyte.

KW - Electrical conductivity

KW - Interconnect

KW - SOFC

KW - Sinterability

KW - TEC

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DO - 10.1016/j.jallcom.2009.02.095

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SN - 0925-8388

VL - 480

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JO - Journal of Alloys and Compounds

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ER -

Effect of Ca²⁺ and Zn²⁺ cations substitution on the properties of La_0.85Sr_0.15CrO₃ as SOFC interconnect

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