Limitation of Thickness Increment of Lanthanum Strontium Cobaltite Cathode Fabricated by Pulsed Laser Deposition
- Limitation of Thickness Increment of Lanthanum Strontium Cobaltite Cathode Fabricated by Pulsed Laser Deposition
- 노호성; 이헌; 지호일; 이해원; 이종호; 손지원
- SOFC; Thin Film; PLD; LSC
- Issue Date
- Journal of the Electrochemical Society
- VOL 158, NO 1, B1-B4
- The limitation of thickness increment of a lanthanum strontium cobaltite cathode fabricated by pulsed laser deposition was
investigated at a thickness range of 0.5–7 ㎛. The cell performance increased monotonically from 477 to 984 mW/㎠ at 0.7 V
at 650°C [humidified H2 (3% H2O) fuel and air] as the cathode thickens from 0.5 to 5 ㎛. This was attributed to the increase of
the number of the electrode reaction sites along with the thickness of the cathode. However, the beneficial effect of further cathode
thickness increment above 5 ㎛ was limited by microstructural problems. Delamination at the electrolyte/cathode interface
occurred in cells with cathode thickness of 7 ㎛, leading to an observed drastic drop in cell performance.
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