This Liquid Sodium Borohydride Fuel Cell (NaBH4) technology utilizes sodium borohydride as the fuel and hydrogen peroxide or air as the oxidizer. Waste products are water and sodium metaborate, which can be recycled to produce new sodium borohydride either at a central plant (currently feasible) or in the fuel cell itself (currently in development). An optimized version of the test cell generated 36-W at ~ 60ºC, representing one of the highest power density reported to date for a small fuel cell working at sub-100°C. Automobiles, manned and unmanned aircraft, ships, and auxiliary power units are all ideally suited to an NaBH4/air fuel cell. A 500W stack has been developed and is now operational.

• The fuel is environmentally safe and non flammable
• The liquid fuel minimizes cooling issues, in comparison to H2/O2 systems
• The theoretical potential of NaBH4/H2O2 fuel cells is 2.23V, compared to 1.23V for H2/O2 fuel cells, so fewer cells are needed to construct a stack of resonable voltage
• NaBH4/H2O2 is much less volatile than H2/O2 or gasoline
• No need for heavy structural tanks to store pressurized gasses
• No need to cryogenically store the liquid fuels
• NaBH4/H2O2 is much less toxic to humans than gasoline

Sodium Borohydride Fuel Cell Presentation

For more information on Liquid Sodium Borohydride Fuel Cell technology, contact Richard Dell.