Processing and characterization of ultra-thin yttria-stabilized zirconia (YSZ) electrolytic films for SOFC
Resource
Solid State Ionics 177 (3-4): 351-357
Journal
Solid State Ionics
Journal Issue
177
Pages
351-357
Date Issued
2006
Date
2006
Author(s)
Chen, Yen-Yu
Abstract
Sub-micron yttria-stabilized zirconia (YSZ) electrolyte layer was prepared by a liquid state deposition method and with an average thickness of 0.5 μm to improve the performance of the anode-supported solid oxide fuel cell (SOFC). The YSZ precursors, containing yttrium and zirconium species and an additive, poly-vinyl-pyrrolidone (PVP), were spin-coated on a Ni/YSZ anode substrate. Several properties, including crystalline phases, microstructures, and current-voltage (I-V) characteristics, were investigated. The thin film of 4 mol% Y2O3-doped ZrO2 (4YSZ) consisted of cubic, tetragonal, and a trace of monoclinic phases, and showed a crack-free layer after sintering at 1300 °C. The anode supported SOFC, which consists of the Ni-YSZ anode, 4YSZ electrolyte, and Pt/Pd cathode, showed power densities of 477 mW/cm2 at 600 °C, and 684 mW/cm2 at 800 °C. Otherwise, the surface cracks of the other YSZ-coated samples (e.g. 8YSZ) can be repaired by a multi-coating method. © 2005 Elsevier B.V. All rights reserved.
Subjects
Power density; SOFC; Thin film; YSZ
Other Subjects
Anodes; Cathodes; Electrolysis; Electrolytes; Yttrium compounds; Zirconium compounds; Electrolyte layers; Zirconia species; Zirconium species; Thin films
Type
journal article
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