(Digital Presentation) GDC/YSZ Bilayer Electrolyte Fabrication by In-situ Hydrothermal Growth

Abstract

In this work, we report a highly dense GDC/YSZ bilayer electrolyte prepared via cost-competitive method, at a relatively low sintering temperature. An ultra-thin and dense GDC barrier layer is grown on the surface of as-sintered YSZ electrolyte by twice successive in-situ hydrothermal growth at 180 oC. The GDC/YSZ bilayer electrolyte is successfully fabricated under low sintering temperature below 1200 oC, with overall layer as thick as ~540 nm and ultra-high density as the YSZ electrolyte. The anode supported single cell with LSCF cathode shows maximum power density of ~0.961 W/cm2 at 780 oC. Moreover, the cell runs stably at 720 oC for 300 hours, showing decent durability.