Development of high-performance cathodes for IT-SOFCs through beneficial interfacial reactions

Yunbo Zhou; Baoming An; Youmin Guo; Ran Ran; Zongping Shao

doi:10.1016/j.elecom.2009.09.034

Development of high-performance cathodes for IT-SOFCs through beneficial interfacial reactions

Yunbo Zhou, Baoming An, Youmin Guo, Ran Ran, Zongping Shao

College of Chemical Engineering

Nanjing Tech University

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

13 Scopus citations

Abstract

We propose a new way to develop high-performance cathodes for IT-SOFCs by utilizing the interfacial reactions. SrCoO_x was selected as the starting electrode material, which took a vacancy-ordered 2H BaNiO₃-type structure and showed negligible ionic conductivity and low electrical conductivity. Phase reactions between SrCoO_x and Sm_0.2Ce_0.8O_1.9 happened at 900 °C or higher, resulting in the incorporation of Sm and Ce into its lattice structure. This promoted the phase transition to a cubic perovskite and led to substantial increase in the electrical conductivity and oxygen mobility of the electrode. By utilizing such phase reactions, the SrCoO_x + Sm_0.2Ce_0.8O_1.9 composite was developed into a high performance electrode with a low area specific resistance of 0.08 Ω cm^-2 at 650 °C. An anode-supported cell with such electrode delivered a peak power density of 795 mW cm^-2 at 600 °C.

Original language	English
Pages (from-to)	2216-2219
Number of pages	4
Journal	Electrochemistry Communications
Volume	11
Issue number	11
DOIs	https://doi.org/10.1016/j.elecom.2009.09.034
State	Published - Nov 2009

Keywords

Cathode
Interfacial reaction
Solid-oxide fuel cells
SrCoO

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title = "Development of high-performance cathodes for IT-SOFCs through beneficial interfacial reactions",

abstract = "We propose a new way to develop high-performance cathodes for IT-SOFCs by utilizing the interfacial reactions. SrCoOx was selected as the starting electrode material, which took a vacancy-ordered 2H BaNiO3-type structure and showed negligible ionic conductivity and low electrical conductivity. Phase reactions between SrCoOx and Sm0.2Ce0.8O1.9 happened at 900 °C or higher, resulting in the incorporation of Sm and Ce into its lattice structure. This promoted the phase transition to a cubic perovskite and led to substantial increase in the electrical conductivity and oxygen mobility of the electrode. By utilizing such phase reactions, the SrCoOx + Sm0.2Ce0.8O1.9 composite was developed into a high performance electrode with a low area specific resistance of 0.08 Ω cm-2 at 650 °C. An anode-supported cell with such electrode delivered a peak power density of 795 mW cm-2 at 600 °C.",

keywords = "Cathode, Interfacial reaction, Solid-oxide fuel cells, SrCoO",

author = "Yunbo Zhou and Baoming An and Youmin Guo and Ran Ran and Zongping Shao",

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T1 - Development of high-performance cathodes for IT-SOFCs through beneficial interfacial reactions

AU - Zhou, Yunbo

AU - An, Baoming

AU - Guo, Youmin

AU - Ran, Ran

AU - Shao, Zongping

PY - 2009/11

Y1 - 2009/11

N2 - We propose a new way to develop high-performance cathodes for IT-SOFCs by utilizing the interfacial reactions. SrCoOx was selected as the starting electrode material, which took a vacancy-ordered 2H BaNiO3-type structure and showed negligible ionic conductivity and low electrical conductivity. Phase reactions between SrCoOx and Sm0.2Ce0.8O1.9 happened at 900 °C or higher, resulting in the incorporation of Sm and Ce into its lattice structure. This promoted the phase transition to a cubic perovskite and led to substantial increase in the electrical conductivity and oxygen mobility of the electrode. By utilizing such phase reactions, the SrCoOx + Sm0.2Ce0.8O1.9 composite was developed into a high performance electrode with a low area specific resistance of 0.08 Ω cm-2 at 650 °C. An anode-supported cell with such electrode delivered a peak power density of 795 mW cm-2 at 600 °C.

AB - We propose a new way to develop high-performance cathodes for IT-SOFCs by utilizing the interfacial reactions. SrCoOx was selected as the starting electrode material, which took a vacancy-ordered 2H BaNiO3-type structure and showed negligible ionic conductivity and low electrical conductivity. Phase reactions between SrCoOx and Sm0.2Ce0.8O1.9 happened at 900 °C or higher, resulting in the incorporation of Sm and Ce into its lattice structure. This promoted the phase transition to a cubic perovskite and led to substantial increase in the electrical conductivity and oxygen mobility of the electrode. By utilizing such phase reactions, the SrCoOx + Sm0.2Ce0.8O1.9 composite was developed into a high performance electrode with a low area specific resistance of 0.08 Ω cm-2 at 650 °C. An anode-supported cell with such electrode delivered a peak power density of 795 mW cm-2 at 600 °C.

KW - Cathode

KW - Interfacial reaction

KW - Solid-oxide fuel cells

KW - SrCoO

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DO - 10.1016/j.elecom.2009.09.034

M3 - 文章

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SN - 1388-2481

VL - 11

SP - 2216

EP - 2219

JO - Electrochemistry Communications

JF - Electrochemistry Communications

IS - 11

ER -

Development of high-performance cathodes for IT-SOFCs through beneficial interfacial reactions

Abstract

Keywords

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