(219f) A Hybrid-Silicon Miniature Hydrogen Fuel Cell for Portable Power Generation

Authors: 
Morgan, R. D., University of Illinois at Urbana-Champaign
Lin, K. Y., University of Illinois at Urbana-Champaign
Kim, H. S., University of Illinois
Gurau, B., University of Illinois
Shannon, M., University of Illinois
Masel, R. I., University of Illinois at Urbana-Champaign


The objective of this talk is to describe a 1mm^2 hybrid hydrogen / self-breathing cathode fuel cell that produces a higher power output than other previously reported miniature hydrogen fuel cells. As background, MEMS based fuel cells have been proposed to replace batteries in distributed sensor networks, on chip power, and implantable devices. As of yet, MEMS based fuel cells give performance no better than miniature batteries [1-9]. Prior to our work, the best MEMS based hydrogen/air fuel cell only produced 70 mW/cm2 compared to 149 mW/cm2 in our device. Yu et al[2] showed 195 mW/cm2 by running pure oxygen on the cathode, but note that powers are 4-5 times higher with oxygen than with air. Our device shows the highest power output of those shown previously.

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