Clean Technology 2010

Design of a Dry Borohydride/Peroxide Fuel Cell for Robotic Vehicles

G.H. Miley, N. Luo, K-J Kim, X. Yang, A.S. Ved
University of Illinois, US

Keywords: fuel cell, dry borohydride, peroxide, robotic vehivcle power, lng shelf life, high energy density

Abstract:

We have fabricated and tested a 20W (average power with short pulses to 45W)) prototype fuel cell as an auxiliary power for robotic vehicles. The energy density is over 300 Watt-hour/kg. This cell is l essentially a dry-borohydride/injected-hydrogen-peroxide fuel cell. This enables extremely long shelf life prior to use. The anode utilizes dry NaBH4 for storage while the cathode chamber is empty during storage. The initiation of cell operation is done by injection of the oxidizer, an aqueous H2O2 solution (stored in a separate container) to the cathode side of the fuel cell. The ionic conduction required for membrane operation is initially helped by the H2O content from the H2O2 solution. Once the electrochemical reaction starts, more water is generated as the reaction product and this continues to maintain a good ionic conductance over the run time of the cell.
 
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