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Thin Yttrium‐Stabilized Zirconia Electrolyte Solid Oxide Fuel Cells by Centrifugal Casting
Author(s) -
Liu Jiang,
Barnett Scott A.
Publication year - 2002
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2002.tb00588.x
Subject(s) - yttria stabilized zirconia , materials science , yttrium , electrolyte , cubic zirconia , solid oxide fuel cell , anode , oxide , polarization (electrochemistry) , cathode , porosity , composite material , analytical chemistry (journal) , chemical engineering , metallurgy , ceramic , electrode , chemistry , chromatography , engineering
A centrifugal casting technique was developed for depositing thin 8‐mol%‐yttrium‐stabilized zirconia (YSZ) electrolyte layers on porous NiO‐YSZ anode substrates. After the bilayers were cosintered at 1400°C, dense pinhole‐free YSZ coatings with thicknesses of ∼25 μm were obtained, while the Ni‐YSZ retained porosity. After La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF)‐Ce 0.9 Gd 0.1 O 1.95 (GDC) or La 0.8 Sr 0.2 MnO 3 (LSM)‐YSZ cathodes were deposited, single SOFCs produced near‐theoretical open‐circuit voltages and power densities of ∼1 W/cm 2 at 800°C. Impedance spectra measured during cell tests showed that polarization resistances accounted for ∼70%–80% of the total cell resistance.