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Advanced Ceramic Materials for Intermediate Temperature Proton-Conducting Fuel Cells

Tech ID #: 771.3 CONNECT WITH A MANAGER FOR LICENSING

Description of Technology

Researchers at the University of Calgary have developed a new class of chemically stable proton-conducting electrolyte and anode materials for intermediate temperature solid oxide fuel cells (SOFC). These perovskite materials display high conductivities (fig. 1) and high stability to C02 and steam. In comparison to a commercially available intermediate temperature electrolyte such as Gd-doped Ce02 (Ce0.9Gd0.1O1.95) the materials made at the University of Calgary show improved conductivities at lower temperatures.

Intermediate temperature (IT) SOFCs (operating temperature = 400-700 degrees celsius) that rely on conduction of protons (H+) do not need as high of temperatures to achieve high conductivities. Lower operating temperatures enable both a more rapid start-up time and the use of cheaper stainless steel cell inter connects. The most common intermediate temperature SOFC electrolyte is a yttrium-doped BaCeO3 (Y-BC). Y-BC, however, suffers from issues of chemical stability to by-products including CO2 and H2O.

Areas of Application
  • High conductivity electrolyte for intermediate temperature SOFCs
  • Green hydrogen production
  • Co-electrolysis of C02 and steam to produce synthesis gas
  • Gas sensors
IP Status
  • Patent - US 8,748,058 B2
  • Published patent application US 2017/0149082 A1
Competitive Advantages
  • High stability CO2 and H2O
  • High conductivities over 400-700 degrees celsius temperature range
Stage Of Development
  • Simple SOFC button cells demonstrate high capacitance and open-circuit voltage
  • Matching anode and cathode materials are being developed