Double Perovskite Sr₂CoFeO₅₊_δ: Preparation and Performance as Cathode Material for Intermediate-temperature Solid Oxide Fuel Cells Article Swipe

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Zhengpeng Chen , Fangjun Jin , Mingfei Li , Jiangbo Dong , Renci Xu , Hanzhao Xu , Kai Xiong , Muming Rao , Chuangting Chen , Xiaowei Li , Yihan Ling ·

YOU? · · 2023 · Open Access · · DOI: https://doi.org/10.15541/jim20230428

As the operating temperature decreases, intermediate-temperature solid oxide fuel cells (IT-SOFCs) require cathode materials with high catalytic activity.In this study, double perovskite Sr2CoFeO5+δ (SCF) was synthesized by Sol-Gel method, and the effect of different ratios of SCF cathode compounded with 20% (molar fraction) Sm2O3 doped CeO2 (SDC) on the electrode performance was elucidated.The SOFC single-cell performance was improved by the optimized chemical expansion and area-specific resistance (ASR) from composite electrodes.Results show that, the good chemical compatibility with common electrolytes can be observed from the SCF cathode after annealing at 950 ℃ for 10 h, and the average thermal expansion coefficient (TEC) of pure SCF can be significantly reduced for the composite sample of SCF and SDC at a mass ratio of 1:1, from 2.44×10 -5 to 1.54×10 -5 K -1 .ASR of SCF-xSDC (SDC content: 20%, 30%, 40%, 50%(in mass)) composite cathodes were as low as 0.036, 0.034, 0.028 and 0.092 Ω•cm 2 at 800 ℃, respectively.The SCF-40SDC composite cathode exhibited the lowest ASR value in the whole temperature range.Based on the 0.3 mm-thick La0.9Sr0.1Ga0.8Mg0.2O3-δ(LSGM) electrolyte, the maximum power density of SOFC using SCF-40SDC (757 mW• cm -2 ) as a cathode is higher than that of SCF (684 mW• cm -2 ).These results demonstrate that the SCF-40SDC composite cathode is a promising candidate for application in IT-SOFCs.

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Materials Science

Perovskite (Structure)

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Materials science Perovskite (structure) Fuel cells Cathode Oxide Chemical engineering Solid oxide fuel cell Metallurgy Physical chemistry Anode Engineering Electrode Chemistry

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Type: article
Language: en
Landing Page: https://doi.org/10.15541/jim20230428
PDF: https://www.jim.org.cn/EN/article/downloadArticleFile.do?attachType=PDF&id=14954
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Cited By: 8
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DOI: https://doi.org/10.15541/jim20230428

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Title: Double Perovskite Sr₂CoFeO₅₊_δ: Preparation and Performance as Cathode Material for Intermediate-temperature Solid Oxide Fuel Cells

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Publication year: 2023

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Publication date: 2023-11-28

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Authors: Zhengpeng Chen, Fangjun Jin, Mingfei Li, Jiangbo Dong, Renci Xu, Hanzhao Xu, Kai Xiong, Muming Rao, Chuangting Chen, Xiaowei Li, Yihan Ling

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Landing page: https://doi.org/10.15541/jim20230428

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Concepts: Materials science, Perovskite (structure), Fuel cells, Cathode, Oxide, Chemical engineering, Solid oxide fuel cell, Metallurgy, Physical chemistry, Anode, Engineering, Electrode, Chemistry

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Cited by: 8

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Double Perovskite Sr2CoFeO5+δ: Preparation and Performance as Cathode Material for Intermediate-temperature Solid Oxide Fuel Cells Article Swipe

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Double Perovskite Sr₂CoFeO₅₊_δ: Preparation and Performance as Cathode Material for Intermediate-temperature Solid Oxide Fuel Cells Article Swipe