Correlation between fast oxygen kinetics and enhanced performance in Fe doped layered perovskite cathodes for solid oxide fuel cells

Areum Jun; Seonyoung Yoo; Young Wan Ju; Junji Hyodo; Sihyuk Choi; Hu Young Jeong; Jeeyoung Shin; Tatsumi Ishihara; Tak Hyoung Lim; Guntae Kim

doi:10.1039/c5ta02158h

Correlation between fast oxygen kinetics and enhanced performance in Fe doped layered perovskite cathodes for solid oxide fuel cells

Areum Jun, Seonyoung Yoo, Young Wan Ju, Junji Hyodo, Sihyuk Choi, Hu Young Jeong, Jeeyoung Shin, Tatsumi Ishihara, Tak Hyoung Lim, Guntae Kim

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Abstract

Many researchers have recently focused on layered perovskite oxides as cathode materials for solid oxide fuel cells because of their much higher chemical diffusion and surface exchange coefficients relative to those of ABO₃-type perovskite oxides. Herein, we study the catalytic effect of Fe doping into SmBa_0.5Sr_0.5Co₂O_5+δ on the oxygen reduction reaction (ORR) and investigate the optimal Fe substitution through an analysis of the structural characteristics, electrical properties, redox properties, oxygen kinetics, and electrochemical performance of SmBa_0.5Sr_0.5Co_2-xFe_xO_5+δ (x = 0, 0.25, 0.5, 0.75, and 1.0). The optimal Fe substitution, SmBa_0.5Sr_0.5Co_1.5Fe_0.5O_5+δ, enhanced the performance and redox stability remarkably and also led to satisfactory electrical properties and electrochemical performance due to its fast oxygen bulk diffusion and high surface kinetics under typical fuel cell operating conditions. The results suggest that SmBa_0.5Sr_0.5Co_1.5Fe_0.5O_5+δ is a promising cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs).

Original language	English
Pages (from-to)	15082-15090
Number of pages	9
Journal	Journal of Materials Chemistry A
Volume	3
Issue number	29
DOIs	https://doi.org/10.1039/c5ta02158h
Publication status	Published - Jun 11 2015

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Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

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title = "Correlation between fast oxygen kinetics and enhanced performance in Fe doped layered perovskite cathodes for solid oxide fuel cells",

abstract = "Many researchers have recently focused on layered perovskite oxides as cathode materials for solid oxide fuel cells because of their much higher chemical diffusion and surface exchange coefficients relative to those of ABO3-type perovskite oxides. Herein, we study the catalytic effect of Fe doping into SmBa0.5Sr0.5Co2O5+δ on the oxygen reduction reaction (ORR) and investigate the optimal Fe substitution through an analysis of the structural characteristics, electrical properties, redox properties, oxygen kinetics, and electrochemical performance of SmBa0.5Sr0.5Co2-xFexO5+δ (x = 0, 0.25, 0.5, 0.75, and 1.0). The optimal Fe substitution, SmBa0.5Sr0.5Co1.5Fe0.5O5+δ, enhanced the performance and redox stability remarkably and also led to satisfactory electrical properties and electrochemical performance due to its fast oxygen bulk diffusion and high surface kinetics under typical fuel cell operating conditions. The results suggest that SmBa0.5Sr0.5Co1.5Fe0.5O5+δ is a promising cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs).",

author = "Areum Jun and Seonyoung Yoo and Ju, {Young Wan} and Junji Hyodo and Sihyuk Choi and Jeong, {Hu Young} and Jeeyoung Shin and Tatsumi Ishihara and Lim, {Tak Hyoung} and Guntae Kim",

year = "2015",

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doi = "10.1039/c5ta02158h",

language = "English",

volume = "3",

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journal = "Journal of Materials Chemistry A",

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TY - JOUR

T1 - Correlation between fast oxygen kinetics and enhanced performance in Fe doped layered perovskite cathodes for solid oxide fuel cells

AU - Jun, Areum

AU - Yoo, Seonyoung

AU - Ju, Young Wan

AU - Hyodo, Junji

AU - Choi, Sihyuk

AU - Jeong, Hu Young

AU - Shin, Jeeyoung

AU - Ishihara, Tatsumi

AU - Lim, Tak Hyoung

AU - Kim, Guntae

PY - 2015/6/11

Y1 - 2015/6/11

N2 - Many researchers have recently focused on layered perovskite oxides as cathode materials for solid oxide fuel cells because of their much higher chemical diffusion and surface exchange coefficients relative to those of ABO3-type perovskite oxides. Herein, we study the catalytic effect of Fe doping into SmBa0.5Sr0.5Co2O5+δ on the oxygen reduction reaction (ORR) and investigate the optimal Fe substitution through an analysis of the structural characteristics, electrical properties, redox properties, oxygen kinetics, and electrochemical performance of SmBa0.5Sr0.5Co2-xFexO5+δ (x = 0, 0.25, 0.5, 0.75, and 1.0). The optimal Fe substitution, SmBa0.5Sr0.5Co1.5Fe0.5O5+δ, enhanced the performance and redox stability remarkably and also led to satisfactory electrical properties and electrochemical performance due to its fast oxygen bulk diffusion and high surface kinetics under typical fuel cell operating conditions. The results suggest that SmBa0.5Sr0.5Co1.5Fe0.5O5+δ is a promising cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs).

AB - Many researchers have recently focused on layered perovskite oxides as cathode materials for solid oxide fuel cells because of their much higher chemical diffusion and surface exchange coefficients relative to those of ABO3-type perovskite oxides. Herein, we study the catalytic effect of Fe doping into SmBa0.5Sr0.5Co2O5+δ on the oxygen reduction reaction (ORR) and investigate the optimal Fe substitution through an analysis of the structural characteristics, electrical properties, redox properties, oxygen kinetics, and electrochemical performance of SmBa0.5Sr0.5Co2-xFexO5+δ (x = 0, 0.25, 0.5, 0.75, and 1.0). The optimal Fe substitution, SmBa0.5Sr0.5Co1.5Fe0.5O5+δ, enhanced the performance and redox stability remarkably and also led to satisfactory electrical properties and electrochemical performance due to its fast oxygen bulk diffusion and high surface kinetics under typical fuel cell operating conditions. The results suggest that SmBa0.5Sr0.5Co1.5Fe0.5O5+δ is a promising cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs).

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Correlation between fast oxygen kinetics and enhanced performance in Fe doped layered perovskite cathodes for solid oxide fuel cells

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