Glass and Glass-Ceramic Sealants for Solid Oxide Fuel Cells

Solid Oxide Fuel Cells (SOFC) are considered among the most promising methods for the efficient and environmentally-friendly production of energy. They convert chemical energy, generated from a combination of fuel (e.g. H2, natural gas) and oxidant (e.g. air) gases across an oxygen ion conducting ceramic, into electrical energy and heat. Due to harsh conditions that the SOFC operate in, such as high operating temperatures (about 600°C to 900°C) and aggressive environments within the cells (fuel, oxidant and humidity), all the materials used for this application must be carefully selected to ensure a safe, reliable and continuous operation of the SOFC. With a wide portfolio of glass and glass-ceramics with unique properties, SCHOTT Electronic Packaging has the ideal products for this demanding application.

For generating power on a large scale, multiple SOFC are combined into high-performance cell stacks. The planar SOFC configuration, commonly used in stacks, provides a simple manufacturing process and high current densities. However, to prevent fuel-oxidant mixing, it also requires hermetic sealing of the metallic layers, serving as interconnects between the individual cells.

SCHOTT offers specially formulated glasses and glass-ceramics, which can withstand the harsh environments and high operating temperatures of SOFC, as sealing materials. They are from the system MO (M=Mg, Ca)-Al2O3-BaO-SiO2-B2O3.
Solid Oxide Fuel Cells
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