Direct applicability of La0.6Sr0.4CoO 3-δ thin film cathode to yttria stabilised zirconia electrolytes at T ≤ 650°C

H. S. Noh, J. W. Son, Heon Lee, J. S. Park, H. W. Lee, J. H. Lee

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

For investigating the direct applicability of highly active cobalt containing cathodes on YSZ electrolytes at a lower processing and operating temperature range (T ≤ 650°C), we fabricated a thin film lanthanum strontium cobalt oxide (LSC) cathode on an yttria stabilised zirconia (YSZ)-based solid oxide fuel cell (SOFC) via pulsed laser deposition (PLD). Its electrochemical performance (5.9 mWcm-2 at 0.7 V, 650°C) was significantly inferior to that (595 mWcm-2 at 0.7 V, 650°C) of an SOFC with a thin (t ∼ 200nm) gadolinium doped ceria (GDC) buffer layer in between the LSC thin film cathode and the YSZ electrolyte. It implies that even though the cathode processing and cell operating temperatures were strictly controlled not to exceed 650°C, the direct application of LSC on YSZ should be avoided. The origin of the cell performance deterioration is thoroughly studied by glancing angle X-ray diffraction (GAXRD) and transmission electron microscopy (TEM), and the decomposition of the cathode and diffusion of La and Sr into YSZ were observed when LSC directly contacted YSZ.

Original languageEnglish
Pages (from-to)1057-1065
Number of pages9
JournalFuel Cells
Volume10
Issue number6
DOIs
Publication statusPublished - 2010 Dec 1

Fingerprint

Yttria stabilized zirconia
Cathodes
Electrolytes
Cobalt
Lanthanum
Strontium
Thin films
Solid oxide fuel cells (SOFC)
Oxides
Gadolinium
Cerium compounds
Buffer layers
Pulsed laser deposition
Processing
Oxide films
Deterioration
Transmission electron microscopy
Decomposition
X ray diffraction
Temperature

Keywords

  • Lanthanum Strontium Cobalt Oxide (LSC)
  • Micro-Solid Oxide Fuel Cells (Micro-SOFCs)
  • Pulsed Laser Deposition (PLD)
  • Thin Film Cathodes

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology

Cite this

Direct applicability of La0.6Sr0.4CoO 3-δ thin film cathode to yttria stabilised zirconia electrolytes at T ≤ 650°C. / Noh, H. S.; Son, J. W.; Lee, Heon; Park, J. S.; Lee, H. W.; Lee, J. H.

In: Fuel Cells, Vol. 10, No. 6, 01.12.2010, p. 1057-1065.

Research output: Contribution to journalArticle

Noh, H. S. ; Son, J. W. ; Lee, Heon ; Park, J. S. ; Lee, H. W. ; Lee, J. H. / Direct applicability of La0.6Sr0.4CoO 3-δ thin film cathode to yttria stabilised zirconia electrolytes at T ≤ 650°C. In: Fuel Cells. 2010 ; Vol. 10, No. 6. pp. 1057-1065.
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