Fabrication and Electrical Properties of YSZ Thin-Film Electrolyte Spin-Coated on Porous La_0.6Sr_0.4Co_0.2Fe_0.8O₃ Substrate from Polymeric

Abstract

Deposition of dense 8mol% Y₂O₃-stabilized ZrO₂ (YSZ) electrolyte thin-films with and without Ce_0.9Gd_0.1O_1.95 (CGO) interlayer by spin coating of polymeric precursor solutions on a porous La_0.6Sr_0.4Co_0.2Fe_0.8O₃ (LSCF) substrate and the electrical properties of the constructed thin-film cell were investigated. Anisotropic crystal growth in the YSZ thin films annealed at 1150°C was confirmed by XRD and SEM. The high-temperature chemical reaction between YSZ and LSCF was depressed by coating a CGO interlayer on the porous LSCF substrate before coating YSZ thin film. The impedance measurements of the electrochemical cell constructed by the LSCF electrode-supported YSZ thin-film electrolyte with CGO interlayer showed a lower electrode reaction resistance.