Performance degradation of lanthanum strontium cobaltite after surface modification

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

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

In the present study, the surface of La0.6Sr0.4CoO3 (LSC) was modified via atomic layer deposition (ALD) using CoO<inf>x</inf> as the modification material. The effect of the ALD CoO<inf>x</inf> treatment on the LSC-based anode-supported solid oxide fuel cell was analyzed and the ALD CoO<inf>x</inf>-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<inf>x</inf> treatment; this increased impedance is believed to be associated with the limitation of O2 adsorption and dissociation.

Original languageEnglish
Pages (from-to)F622-F626
JournalJournal of the Electrochemical Society
Volume162
Issue number6
DOIs
Publication statusPublished - 2015

Fingerprint

Lanthanum
Strontium
Atomic layer deposition
atomic layer epitaxy
lanthanum
strontium
Surface treatment
impedance
degradation
Degradation
solid oxide fuel cells
Solid oxide fuel cells (SOFC)
cells
Electrochemical impedance spectroscopy
deterioration
stems
Deterioration
radiant flux density
Anodes
anodes

ASJC Scopus subject areas

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

Cite this

Performance degradation of lanthanum strontium cobaltite after surface modification. / Choi, Hyung Jong; Bae, Kiho; Jang, Dong Young; Kim, Jun Woo; Shim, Joon Hyung.

In: Journal of the Electrochemical Society, Vol. 162, No. 6, 2015, p. F622-F626.

Research output: Contribution to journalArticle

Choi, Hyung Jong ; Bae, Kiho ; Jang, Dong Young ; Kim, Jun Woo ; Shim, Joon Hyung. / Performance degradation of lanthanum strontium cobaltite after surface modification. In: Journal of the Electrochemical Society. 2015 ; Vol. 162, No. 6. pp. F622-F626.
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