Thin film of Yttria stabilised zirconia on NiO using vacuum cold spraying process for solid oxide fuel cell (original) (raw)
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Phase Transformation in Spray Pyrolysis Yttria-stabilized Zirconia Thin Films
ECS Transactions, 2009
The phase transformation of yttria-stabilized zirconia (ZrO2)0.92(Y2O3)0.08 (8YSZ) thin films used as an electrolyte layer in micro-solid oxide fuel cells (µ-SOFCs) is investigated. Amorphous 8YSZ thin films are deposited by spray pyrolysis and their crystal symmetry, phase transformation and pore formation during heat treatment are analyzed. Both microstructure and phase transformation can affect the thin film properties such as electrical y and therefore the overall performance of the µ-SOFC.
ACS applied materials & interfaces, 2015
Nanoscale yttria-stabilized zirconia (YSZ) electrolyte film was deposited by plasma-enhanced atomic layer deposition (PEALD) on a porous anodic aluminum oxide supporting substrate for solid oxide fuel cells. The minimum thickness of PEALD-YSZ electrolyte required for a consistently high open circuit voltage of 1.17 V at 500 °C is 70 nm, which is much thinner than the reported thickness of 180 nm using nonplasmatic ALD and is also the thinnest attainable value reported in the literatures on a porous supporting substrate. By further reducing the electrolyte thickness, the grain size reduction resulted in high surface grain boundary density at the cathode/electrolyte interface.