Abstract: This invention describes the recipe and preparation process of nano-scale electrolyte suspension and its application via a spin coating process for fabrication of airtight/fully dense electrolyte layers composed in solid oxide fuel cell-membrane electrode assembly with high performance characteristics. The recipe of nano-scale electrolyte suspension includes 10˜50 wt % nano-scale electrolyte powder, 0.01˜1 wt % poly acrylic acid (PAA as dispersant), 0.1˜5 wt % poly vinyl alcohol (PVA as binder), 0.005˜1 wt % octanol as defoamer, and deionized water as solvent. Solid oxide fuel cell fabricated via this recipe and process exhibits that the open-circuit voltage (OCV) is over 1 Volt, and maximum power density is 335 mW/cm2 at 800° C.

Abstract: The innovation process describes the process and results for fabrication of a magnetron sputter deposited fully dense electrolyte layer (8YSZ/GDC/LSGM) embedded in a high performance membrane electrolyte assembly (MEA) (Unit Cell) of Solid Oxide Fuel Cell. A single cell with airtight electrolyte layer (8YSZ/GDC/LSGM) is prepared via thin film technique of magnetron sputter deposition, combined with SOFC-MEA processing methods (such as tape casting, lamination, vacuum hot pressing, screen printing, spin coating, and plasma spray coating) and sintering optimization conditions. The gas permeability of the electrolyte layer is below 1×10?6 L/cm2/sec and the open circuit voltage/power density of the single cell performance test exceeds 1.0 V and 500 mW/cm2.

Abstract: This invention describes the process for fabrication of a high conductivity and low resistance solid oxide fuel cell. An anode substrate is mainly prepared via tape casting technique and modified by abrasion and polish process. Electrolyte is fabricated onto the polished side by thin film technologies and can attach well in the cross section. Grinding surface of anode side about 10-30 ?m after finish of MEA combination can get a high conductivity and low resistance unit cell and enhance cell performance effectively.

Abstract: An innovation scheme and technology used for controlling porosity/gas permeability of electrode layers of SOFC-MEA through combination of pore former and sintering manipulations. The porosity of electrode layer is 0-35 vol. %, and the gas permeability of electrode layer is 1×10?3?1×10?6 L/cm2/sec.

Abstract: This invention describes the process for fabrication of a fully dense electrolyte layer (8YSZ/GDC/LSGM) embedded in a high performance membrane electrolyte assembly (MEA) (Unit Cell) of Solid Oxide Fuel Cell. An air-tight electrolyte layer (8YSZ/GDC/LSGM) is mainly prepared via tape casting technique and modified by thin film technologies, such as sputtering coating, spin coating, plasma spray/Coating etc., as well as combined with the sintering scheme and operation control. The gas permeability of electrolyte layer is less than 1×10?6 L/cm2/sec.

Abstract: A recipe and two sequential processes for fabrication of electrode substrates of solid oxide fuel cells (SOFCs) are described in this invention. The typical recipe consists of 50˜86 wt % electrolyte (8YSZ) or 50˜80 wt % anode electrode (NiO/8YSZ), 12˜22 wt % MEK (solvent 1), 5˜9 wt % EtOH (solvent 2), 1˜2 wt % TEA (dispersant), 0.5˜2 wt % DBP (plasticizer 1), 0.5˜2 wt % PEG (plasticizer 2), 3˜6 wt % PVB (binder), and 0.1˜10 wt % graphite (pore former). Two sequential processes include: 1. The process for preparation of the green tape slurry from materials of the recipe, 2. The synergistic process for fabrication of a high integrity membrane electrode assembly (MEA) of SOFC from the prepared electrode substrates.