The Ca element effect on the enhancement performance of Sr2Fe1.5Mo0.5O6−δ perovskite as cathode for intermediate-temperature solid oxide fuel cells

Jinshuo Qiao; Wenjun Chen; Wenyi Wang; Zhenhua Wang; Wang Sun; Jing Zhang; Kening Sun

doi:10.1016/j.jpowsour.2016.09.082

The Ca element effect on the enhancement performance of Sr₂Fe_1.5Mo_0.5O_6−δ perovskite as cathode for intermediate-temperature solid oxide fuel cells

Jinshuo Qiao, Wenjun Chen, Wenyi Wang, Zhenhua Wang, Wang Sun, Jing Zhang, Kening Sun^*

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Beijing Institute of Technology

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

37 Citations (Scopus)

Abstract

In this paper, the partial substitution of atomic elements from the A site of a perovskite is investigated in order to develop cathode materials for solid oxide fuel cell (SOFC) applications. Herein, Sr_2−xCa_xFe_1.5Mo_0.5O_6−δ (SCFM), compounds were investigated by characterizing structural properties, chemical compatibility, electrical properties, electrochemical performance and stability. Thermal expansion coefficients were found to decrease when increasing the Ca content. X-ray photoelectron spectroscopy analysis suggests that Ca doping significantly affects the Fe²⁺/Fe³⁺ and Mo⁶⁺/Mo⁵⁺ ratios. For a doping level of x = 0.4, the sample showed the lowest interface polarization (R_p), the highest conductivity and a maximum power density of 1.26 W cm⁻² at 800 °C. These results suggest that SCFM cathode materials are excellent candidates for intermediate temperature solid oxide fuel cells applications.

Original language	English
Pages (from-to)	400-407
Number of pages	8
Journal	Journal of Power Sources
Volume	331
DOIs	https://doi.org/10.1016/j.jpowsour.2016.09.082
Publication status	Published - 1 Nov 2016

Keywords

Ca substitution Cathode
Electrochemical properties
Solid oxide fuel cells

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jpowsour.2016.09.082

Cite this

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title = "The Ca element effect on the enhancement performance of Sr2Fe1.5Mo0.5O6−δ perovskite as cathode for intermediate-temperature solid oxide fuel cells",

abstract = "In this paper, the partial substitution of atomic elements from the A site of a perovskite is investigated in order to develop cathode materials for solid oxide fuel cell (SOFC) applications. Herein, Sr2−xCaxFe1.5Mo0.5O6−δ (SCFM), compounds were investigated by characterizing structural properties, chemical compatibility, electrical properties, electrochemical performance and stability. Thermal expansion coefficients were found to decrease when increasing the Ca content. X-ray photoelectron spectroscopy analysis suggests that Ca doping significantly affects the Fe2+/Fe3+ and Mo6+/Mo5+ ratios. For a doping level of x = 0.4, the sample showed the lowest interface polarization (Rp), the highest conductivity and a maximum power density of 1.26 W cm−2 at 800 °C. These results suggest that SCFM cathode materials are excellent candidates for intermediate temperature solid oxide fuel cells applications.",

keywords = "Ca substitution Cathode, Electrochemical properties, Solid oxide fuel cells",

author = "Jinshuo Qiao and Wenjun Chen and Wenyi Wang and Zhenhua Wang and Wang Sun and Jing Zhang and Kening Sun",

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year = "2016",

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doi = "10.1016/j.jpowsour.2016.09.082",

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T1 - The Ca element effect on the enhancement performance of Sr2Fe1.5Mo0.5O6−δ perovskite as cathode for intermediate-temperature solid oxide fuel cells

AU - Qiao, Jinshuo

AU - Chen, Wenjun

AU - Wang, Wenyi

AU - Wang, Zhenhua

AU - Sun, Wang

AU - Zhang, Jing

AU - Sun, Kening

PY - 2016/11/1

Y1 - 2016/11/1

N2 - In this paper, the partial substitution of atomic elements from the A site of a perovskite is investigated in order to develop cathode materials for solid oxide fuel cell (SOFC) applications. Herein, Sr2−xCaxFe1.5Mo0.5O6−δ (SCFM), compounds were investigated by characterizing structural properties, chemical compatibility, electrical properties, electrochemical performance and stability. Thermal expansion coefficients were found to decrease when increasing the Ca content. X-ray photoelectron spectroscopy analysis suggests that Ca doping significantly affects the Fe2+/Fe3+ and Mo6+/Mo5+ ratios. For a doping level of x = 0.4, the sample showed the lowest interface polarization (Rp), the highest conductivity and a maximum power density of 1.26 W cm−2 at 800 °C. These results suggest that SCFM cathode materials are excellent candidates for intermediate temperature solid oxide fuel cells applications.

AB - In this paper, the partial substitution of atomic elements from the A site of a perovskite is investigated in order to develop cathode materials for solid oxide fuel cell (SOFC) applications. Herein, Sr2−xCaxFe1.5Mo0.5O6−δ (SCFM), compounds were investigated by characterizing structural properties, chemical compatibility, electrical properties, electrochemical performance and stability. Thermal expansion coefficients were found to decrease when increasing the Ca content. X-ray photoelectron spectroscopy analysis suggests that Ca doping significantly affects the Fe2+/Fe3+ and Mo6+/Mo5+ ratios. For a doping level of x = 0.4, the sample showed the lowest interface polarization (Rp), the highest conductivity and a maximum power density of 1.26 W cm−2 at 800 °C. These results suggest that SCFM cathode materials are excellent candidates for intermediate temperature solid oxide fuel cells applications.

KW - Ca substitution Cathode

KW - Electrochemical properties

KW - Solid oxide fuel cells

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