Novel Mixed Ionic and Electronic Conductor Based on Sr2Fe2-xMoxO6 Double Perovskite

Description:

Reference #: 00820

The University of South Carolina is offering licensing opportunities for this technology.

Potential Applications:

The cell with this unique structure has potential application in the field of ‘self-regenerative’ solid oxide fuel cells to overcome electrode deactivation issues. Redox stable and mixed conducting SFM perovskite materials can also find applications in oxygen permeation membranes.

Advantages and Benefits:

Dr. Chen’s invention demonstrates a novel self-regenerating electrode concept for SOFCs: both the anode and the cathode are the same material, and the fuel cell can be operated by alternating the flow of the fuel and the oxidant.

Invention Description:

Solid oxide fuel cells (SOFCs) convert chemical energy from the fuel directly to electricity, offer high system efficiency and are environmentally benign. In a SOFC, a gas tight ionic conducting electrolyte is sandwiched between two porous electrodes (anode and cathode). Electrodes are the critical components for an SOFC where the electrochemical reactions take place: fuel is oxidized in the anode while oxygen is reduced in the cathode. However, the development and widespread adoption of SOFC technology are hampered since the anode and cathode catalysts are deactivated during operation due to sulfur and carbon species binding to the surface of the anode catalyst and chromia deposits accruing on the surface of the cathode catalyst.

Perovskite, Sr2Fe1.5Mo0.5O6-δ (SFM), demonstrates exceptional redox stability and mixed ionic and electronic conductivity, not only in an oxidizing environment but also in a reducing environment. Perovskite SFM has been applied as electrode for self-regenerative solid oxide fuel cells (SOFCs). Both the anode and the cathode are the same SFM materials, and the fuel cell can be operated by alternating the flow of the fuel and the oxidant, thus regenerating the electrode from sulfur poisoning, coking and chromia poisoning.

Patent Information:
Title App Type Country Serial No. Patent No. File Date Issued Date Expire Date Patent Status
Mixed Ionic and Electronic Conductor Based on Sr2Fe2-xMoxO6 Double Perovskite Utility United States 13/020,356 8,778,560 2/3/2011 7/15/2014   Issued
For Information, Contact:
Technology Commercialization
University of South Carolina
technology@sc.edu
Inventors:
Fanglin Chen
Qiang Liu
Keywords:
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