"An Innovative Triple Function Cathode for MEMS Fuel Cells"

Although fuel cells are expensive on a per-unit-of-power basis, they are superior to batteries in every other performance measure. The cost of a miniature fuel cell may fit within the ¿impulse purchase¿ price range, or it may represent a small increase to the cost of a ¿big-ticket¿ item of portable electronics. Hence, miniature fuel cells are more likely to be purchased than large fuel cells. They also tend to be less complicated and more efficient. This project will develop an innovative triple-function material for an electrode that should exceed the power and energy density of other MEMS scale fuel cells. Phase I will deal with the fabrication of a MEMS fuel cell electrode assembly that uses carbon micro tubes to increase the power density and specific energy of the elelctrochemical system. The approach will include the following objectives: (1) fabrication of an electrode assembly using the proposed electrode material, (2) introduction of a suitable catalyst to promote kinetics, (3) optimization of fuel feeding within the electrode structure, and (4) evaluation of electrode performance and its cost. Commercial Applications and other Benefits as described by the awardee: The new electrode material should enhance the performance, energy density, and power density of compact MEMS fuel cells. This compact structure should make the electrochemical system practical for use in transportation vehicles; aircraft propulsion systems; high-altitude, long-endurance, remotely-piloted aircraft systems; and consumer electronics.