Study on the electrode reaction mechanism of pulsed-laser deposited thin-film La1-xSrxCoO3-δ (x = 0.2. 0.4) cathodes

Jaeyeon Hwang, Heon Lee, Kyung Joong Yoon, Hae Weon Lee, Byung Kook Kim, Jong Ho Lee, Ji Won Son

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In order to investigate the effect of Sr composition on performance of La1-xSrxCoO3-δ (LSC) cathodes, LSC thin-film cathodes which have different Sr doping levels as x = 0.2 (LSC82) and x = 0.4 (LSC64) are selected and fabricated by using pulsed laser deposition (PLD). The cathodes are formed on an anode-supported solid oxide fuel cell (SOFC) with an yttria-stabilized zirconia (YSZ) electrolyte and a gadolinia-doped ceria (GDC) buffer layer. The power output of the cell with the LSC64 cathode (LSC64 cell) is at least twice higher than that of the cell with the LSC82 cathode (LSC82 cell) at operating temperatures below 650°C. Since microstructural differences are hardly found between the two thin-film cathodes, this performance difference is believed to originate from the difference in the defect chemical nature of LSCs and its related electrocatalytic activity. In terms of the performance drop by decreasing the operation temperature or the oxygen partial pressure at the cathode side, that of the LSC64 cell is much less than that of the LSC82 cell as well.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume159
Issue number10
DOIs
Publication statusPublished - 2012 Dec 1

Fingerprint

Pulsed lasers
pulsed lasers
Cathodes
cathodes
Thin films
Electrodes
electrodes
cell cathodes
thin films
cells
solid oxide fuel cells
gadolinium
yttria-stabilized zirconia
operating temperature
pulsed laser deposition
partial pressure
Gadolinium
Yttria stabilized zirconia
anodes
Cerium compounds

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

Study on the electrode reaction mechanism of pulsed-laser deposited thin-film La1-xSrxCoO3-δ (x = 0.2. 0.4) cathodes. / Hwang, Jaeyeon; Lee, Heon; Yoon, Kyung Joong; Lee, Hae Weon; Kim, Byung Kook; Lee, Jong Ho; Son, Ji Won.

In: Journal of the Electrochemical Society, Vol. 159, No. 10, 01.12.2012.

Research output: Contribution to journalArticle

Hwang, Jaeyeon ; Lee, Heon ; Yoon, Kyung Joong ; Lee, Hae Weon ; Kim, Byung Kook ; Lee, Jong Ho ; Son, Ji Won. / Study on the electrode reaction mechanism of pulsed-laser deposited thin-film La1-xSrxCoO3-δ (x = 0.2. 0.4) cathodes. In: Journal of the Electrochemical Society. 2012 ; Vol. 159, No. 10.
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