Performance of solid oxide fuel cell with gradient-structured thin-film cathode composed of pulsed-laser-deposited lanthanum strontium manganite-yttria-stabilized zirconia composite

Doo Hwan Myung, Jongill Hong, Jaeyeon Hwang, Jong Ho Lee, Hae Weon Lee, Byung Kook Kim, Sung Gurl Cho, Ji Won Son

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Abstract

The effect of the application of lanthanum strontrium manganite and yttria-stabilized zirconia (LSM-YSZ) nano-composite fabricated by pulsed laser deposition (PLD) as a cathode of solid oxide fuel cell (SOFC) is studied. A gradient-structure thin-film cathode composed of 1 micron-thick LSM-YSZ deposited at an ambient pressure (Pamb) of 200 mTorr; 2 micron-thick LSM-YSZ deposited at a Pamb of 300 mTorr; and 2 micron-thick lanthanum strontium cobaltite (LSC) current collecting layer was fabricated on an anode-supported SOFC with an ∼8 micron-thick YSZ electrolyte. In comparison with a 1 micron-thick nano-structure single-phase LSM cathode fabricated by PLD, it was obviously effective to increase triple phase boundaries (TPB) over the whole thickness of the cathode layer by employing the composite and increasing the physical thickness of the cathode. Both polarization and ohmic resistances of the cell were significantly reduced and the power output of the cell was improved by a factor of 1.6.

Original languageEnglish
Pages (from-to)487-492
Number of pages6
JournalJournal of the Korean Ceramic Society
Volume48
Issue number6
DOIs
Publication statusPublished - 2011 Nov

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

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