Thin film yttria-stabilized zirconia electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs) by chemical solution deposition
- Thin film yttria-stabilized zirconia electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs) by chemical solution deposition
- 오은옥; 황진명; 이유리; 이종흔; 윤경중; 김병국; 손지원; 이종호; 이해원
- SOFC; Sol-gel processes; Microstructure; Y2O3-ZrO2; Constrain sintering; Fuel cells
- Issue Date
- Journal of the European Ceramic Society
- VOL 32, NO 8, 1733-1741
- A 500 nm thick thin film YSZ (yttria-stabilized zirconia) electrolyte was successfully fabricated on a conventionally processed anode substrate by
spin coating of chemical solution containing slow-sintering YSZ nanoparticles with the particle size of 20 nm and subsequent sintering at 1100 ◦C.
Incorporation of YSZ nanoparticles was effective for suppressing the differential densification of ultrafine precursor powder by mitigating the
prevailing bi-axial constraining stress of the rigid substrate with numerous local multi-axial stress fields around them. In particular, adding 5 vol%
YSZ nanoparticles resulted in a dense and uniform thin film electrolyte with narrow grain size distribution, and fine residual pores in isolated state.
The thin film YSZ electrolyte placed on a rigid anode substrate with the GDC (gadolinia-doped ceria) and LSC (La0.6Sr0.4CoO3−δ) layers deposited
by PLD (pulsed laser deposition) processes revealed that it had fairly good gas tightness relevant to a SOFC (solid oxide fuel cell) electrolyte and
maintained its structural integrity during fabrication and operation processes. In fact, the open circuit voltage was 1.07 V and maximum power
density was 425 mW/cm2 at 600 ◦C, which demonstrates that the chemical solution route can be a viable means for reducing electrolyte thickness
for low- to intermediate-temperature SOFCs.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.