Fuel Cells Using Low-Temperature Conducting Materials
Tech ID: 11235 / UC Case 2005-510-0
Preparation of Nanometric Oxides that Exhibit Enhanced Protonic Conductivity at Low Temperatures
Researchers at the University of California, Davis, have developed a novel method to fabricate nanometric oxides that exhibit enhanced conductivity by a different mechanism. Conduction in these materials (e.g., cubic zirconia and other materials with similar properties) takes place by protonic movement as opposed to ionic mobility, making it possible to operate a fuel cell at much lower temperatures. The marked reduction of the resistivity in these materials at low temperatures are comparable to that typical of other protonic conductors, but with the advantage of superior mechanical properties, chemical stabilities, and the lack of need for a catalyst.
- 2007-679 - Solid Oxide Fuel Cell with a Nanowire Composite Cathode
- Also see Advanced Solid Oxide Fuel Cell Stack Design for Power Generation available from UC Santa Barbara.
Manufacturers of oxide fuel cells and those involved in hydrogen separation.
This method is advantageous in fuel cell technology due to operating at much lower temperatures (i.e., 50 - 100°C), resulting in economic benefits, since many of the existing problems in these types of fuel cells originate from the deleterious effects of high temperature on electrodes and related components.
- Anselmi-Tamburini U, Maglia F, Chiodelli G, Riello P, Bucella S, and Munir ZA. 2006. Enhanced low-temperature protonic conductivity in fully dense nanometric cubic zirconia. Appl. Phys. Lett. 89, 163116.
- Kim S, Anselmi-Tamburini U, Park HJ, Martin M, and Munir ZA. 2008. Unprecedented Room-Temperature Electrical Power Generation Using Nanoscale Fluorite-Structured Oxide Electrolytes. Adv. Mater. 20, 556–559
|United States Of America||Issued Patent||7,601,403||10/13/2009||2005-510|
Additional Patent Pending
- Garay, Javier E.
- Kim, Sangtae
- Munir, Zuhair A.
nanometric oxides, fuel cells, oxide fuel cells