Abstract
The cubic fluorite structure Sm0.2Ce0.8O1.9 (SDC) film was fabricated by pulsed laser deposition (PLD) to be used as electrolyte for solid oxide fuel cells (SOFCs). The SDC target was prepared by co-precipitation process at a low sintering temperature (1,250 °C) with a relative density of 97 %. By inserting the PLD seed layer with the thickness of 3 μm, robust electrolyte films were successfully fabricated on La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) substrate. The SDC film growing at a substrate temperature of 650 °C with thermal treatment and oxygen gas pressure of 10 Pa has high ionic conductivity of 0.075 S·cm−1 at 800 °C. The results demonstrate that the dense SDC thin films prepared by PLD are suitable for low-temperature SOFC applications.
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