Intermediate temperature solid oxide fuel cell using (La,Sr)(Co,Fe)O3-based cathodes

Wi Heon Kim, Hwa Seob Song, Joo Ho Moon, Hae Won Lee

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Anode-supported SOFCs involving LSCF (La0.6Sr0.4Co0.2Fe0.8O3-δ)-based cathodes are fabricated utilizing GDC interlayer on 8YSZ electrolyte for intermediate temperatures. The GDC interlayer between the LSCF cathode and YSZ electrolyte is used to prevent formation of insulating phases such as SrZrO3 or La2Zr2O7. The cell performance with the GDC interlayer was ten times better than the one without GDC at operating temperature of 750 °C. However, the observed power density (370 mW/cm2) was lower than the value reported in the literature. This can be attributed to an imperfect GDC interlayer in the present study. The GDC interlayer was porous and non-uniform, so that adverse interfacial reactions could not be completely prevented. The chemical incompatibility at the interface was evaluated by SEM and EPMA, which explains the dependence of cell performance on sintering temperatures of the GDC interlayer.

Original languageEnglish
Pages (from-to)3211-3216
Number of pages6
JournalSolid State Ionics
Volume177
Issue number35-36
DOIs
Publication statusPublished - 2006 Nov 30

Fingerprint

solid oxide fuel cells
Solid oxide fuel cells (SOFC)
interlayers
Cathodes
cathodes
Electrolytes
Electron probe microanalysis
Surface chemistry
Temperature
temperature
Anodes
Sintering
electrolytes
Scanning electron microscopy
incompatibility
yttria-stabilized zirconia
cells
operating temperature
radiant flux density
sintering

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Kim, Wi Heon ; Song, Hwa Seob ; Moon, Joo Ho ; Lee, Hae Won. / Intermediate temperature solid oxide fuel cell using (La,Sr)(Co,Fe)O3-based cathodes. In: Solid State Ionics. 2006 ; Vol. 177, No. 35-36. pp. 3211-3216.
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Intermediate temperature solid oxide fuel cell using (La,Sr)(Co,Fe)O3-based cathodes. / Kim, Wi Heon; Song, Hwa Seob; Moon, Joo Ho; Lee, Hae Won.

In: Solid State Ionics, Vol. 177, No. 35-36, 30.11.2006, p. 3211-3216.

Research output: Contribution to journalArticle

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T1 - Intermediate temperature solid oxide fuel cell using (La,Sr)(Co,Fe)O3-based cathodes

AU - Kim, Wi Heon

AU - Song, Hwa Seob

AU - Moon, Joo Ho

AU - Lee, Hae Won

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AB - Anode-supported SOFCs involving LSCF (La0.6Sr0.4Co0.2Fe0.8O3-δ)-based cathodes are fabricated utilizing GDC interlayer on 8YSZ electrolyte for intermediate temperatures. The GDC interlayer between the LSCF cathode and YSZ electrolyte is used to prevent formation of insulating phases such as SrZrO3 or La2Zr2O7. The cell performance with the GDC interlayer was ten times better than the one without GDC at operating temperature of 750 °C. However, the observed power density (370 mW/cm2) was lower than the value reported in the literature. This can be attributed to an imperfect GDC interlayer in the present study. The GDC interlayer was porous and non-uniform, so that adverse interfacial reactions could not be completely prevented. The chemical incompatibility at the interface was evaluated by SEM and EPMA, which explains the dependence of cell performance on sintering temperatures of the GDC interlayer.

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