Performance degradation of lanthanum strontium cobaltite after surface modification

Hyung Jong Choi; Kiho Bae; Dong Young Jang; Jun Woo Kim; Joon Hyung Shim

doi:10.1149/2.0971506jes

Performance degradation of lanthanum strontium cobaltite after surface modification

Hyung Jong Choi, Kiho Bae, Dong Young Jang, Jun Woo Kim, Joon Hyung Shim

School of Mechanical Engineering

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

28 Citations (Scopus)

Abstract

In the present study, the surface of La0.6Sr0.4CoO3 (LSC) was modified via atomic layer deposition (ALD) using CoO_x as the modification material. The effect of the ALD CoO_x treatment on the LSC-based anode-supported solid oxide fuel cell was analyzed and the ALD CoO_x-treated cell was found to exhibit lower power density than that of the bare cell. Based on the electrochemical impedance spectroscopy measurements, it was concluded that this degradation stems mainly from the increased polarization loss, which results from the deterioration of the oxygen surface exchange property. Similarly, examining the bode plot revealed that the impedance at frequencies lower than 1 kHz increased mainly after the CoO_x treatment; this increased impedance is believed to be associated with the limitation of O2 adsorption and dissociation.

Original language	English
Pages (from-to)	F622-F626
Journal	Journal of the Electrochemical Society
Volume	162
Issue number	6
DOIs	https://doi.org/10.1149/2.0971506jes
Publication status	Published - 2015

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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10.1149/2.0971506jes

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title = "Performance degradation of lanthanum strontium cobaltite after surface modification",

abstract = "In the present study, the surface of La0.6Sr0.4CoO3 (LSC) was modified via atomic layer deposition (ALD) using CoOx as the modification material. The effect of the ALD CoOx treatment on the LSC-based anode-supported solid oxide fuel cell was analyzed and the ALD CoOx-treated cell was found to exhibit lower power density than that of the bare cell. Based on the electrochemical impedance spectroscopy measurements, it was concluded that this degradation stems mainly from the increased polarization loss, which results from the deterioration of the oxygen surface exchange property. Similarly, examining the bode plot revealed that the impedance at frequencies lower than 1 kHz increased mainly after the CoOx treatment; this increased impedance is believed to be associated with the limitation of O2 adsorption and dissociation.",

author = "Choi, {Hyung Jong} and Kiho Bae and Jang, {Dong Young} and Kim, {Jun Woo} and Shim, {Joon Hyung}",

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year = "2015",

doi = "10.1149/2.0971506jes",

language = "English",

volume = "162",

pages = "F622--F626",

journal = "Journal of the Electrochemical Society",

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TY - JOUR

T1 - Performance degradation of lanthanum strontium cobaltite after surface modification

AU - Choi, Hyung Jong

AU - Bae, Kiho

AU - Jang, Dong Young

AU - Kim, Jun Woo

AU - Shim, Joon Hyung

PY - 2015

Y1 - 2015

N2 - In the present study, the surface of La0.6Sr0.4CoO3 (LSC) was modified via atomic layer deposition (ALD) using CoOx as the modification material. The effect of the ALD CoOx treatment on the LSC-based anode-supported solid oxide fuel cell was analyzed and the ALD CoOx-treated cell was found to exhibit lower power density than that of the bare cell. Based on the electrochemical impedance spectroscopy measurements, it was concluded that this degradation stems mainly from the increased polarization loss, which results from the deterioration of the oxygen surface exchange property. Similarly, examining the bode plot revealed that the impedance at frequencies lower than 1 kHz increased mainly after the CoOx treatment; this increased impedance is believed to be associated with the limitation of O2 adsorption and dissociation.

AB - In the present study, the surface of La0.6Sr0.4CoO3 (LSC) was modified via atomic layer deposition (ALD) using CoOx as the modification material. The effect of the ALD CoOx treatment on the LSC-based anode-supported solid oxide fuel cell was analyzed and the ALD CoOx-treated cell was found to exhibit lower power density than that of the bare cell. Based on the electrochemical impedance spectroscopy measurements, it was concluded that this degradation stems mainly from the increased polarization loss, which results from the deterioration of the oxygen surface exchange property. Similarly, examining the bode plot revealed that the impedance at frequencies lower than 1 kHz increased mainly after the CoOx treatment; this increased impedance is believed to be associated with the limitation of O2 adsorption and dissociation.

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DO - 10.1149/2.0971506jes

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VL - 162

SP - F622-F626

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

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ER -

Performance degradation of lanthanum strontium cobaltite after surface modification

Abstract

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