Low-Cost Thermoelectric Subsytem for Self-Powered Equipment
Department of Defense
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Small Business Information
Alphabet Energy, Inc.
239 8th street, Suite 12, San Francisco, CA, 94103
Socially and Economically Disadvantaged:
AbstractThis SBIR Phase I project will address the technological risks in bringing silicon-based nanostructured thermoelectric materials from a proven laboratory concept to a scalable prototype device. Thermoelectric materials offer great promise in development of self-powered equipment for military use. They are compact, lightweight, highly reliable and virtually maintenance free. Implementation to date has been precluded by the high cost per watt and the low design temperature of existing thermoelectric materials Alphabet Energyâ€™s silicon nanowire thermoelectric materials use low-grade silicon as a raw material and a manufacturing process that utilizes standard semiconductor fabrication tools and facilities. This leads to a device cost in the order of 20Â¢/Watt, 50-100 times cheaper than existing thermoelectrics. Silicon nanowire thermoelectric materials have been tested at temperatures up to 600C without degradation or loss of performance. As such much greater temperature gradients are possible, leading to power densities with existing performance materials of up to 17 kW/m2. Alphabet Energyâ€™s SiNW thermoelectrics can provide a 100W of electric generation for a cost of as little as $16 at 10% efficiency. Furthermore we have an established development pathways to higher efficiencies of 20% or more, leading to a cost of only $8.
* information listed above is at the time of submission.