A Mixed Proton and Carbonate Ion Conductor


Reference #: 00897

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

Invention Description:

Yttrium-doped barium zirconate (BZY) is now considered as an alternative to the oxygen-ion conductor electrolytes conventionally used in IT-SOFCs due to its higher bulk proton conductivity at low temperatures.

BZY has not been fully exploited until now despite its excellent chemical stability because, when prepared as a ceramic polycrystalline material, it suffers from difficult sintering and proton conductivity is decreased by grain boundaries, which have a blocking effect.

However, the subject invention involves a successful development of a dense Yttrium-doped barium zirconate [BZY] that was fabricated at 600oC with a carbonate phase as the sintering aid and evidence of a proton conducting mechanism. The two-phase composite is a mixed proton and carbonate-ion conductor (MPCC).

The presence of carbonate phase simultaneously promotes densification and enhances the proton conduction of the refractory BZY. The ionic conductivities of the carbonate-added BZY are two to three orders of magnitude higher than that of original single BZY. Part of this invention is a novel anode that prevents the loss of carbonate phase in developed mixed proton and carbonate ion conductor based solid oxide fuel cells.

Potential Applications:

Finds application in IT-SOFC

Advantages and Benefits:

  1. Relatively low cost of anode materials
  2. Simple anode fabrication procedure
  3. Drastically minimizes/eliminates significant deposition of carbon synonymous with ordinary nickel anode


Patent Information:
Title App Type Country Serial No. Patent No. File Date Issued Date Expire Date Patent Status
Mixed Proton and Carbonate Ion Conductor Utility United States 13/528,799 9,225,030 6/20/2012 12/29/2015    
For Information, Contact:
Technology Commercialization
University of South Carolina
Kevin Huang
Xue Li
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