Fuel cells have played an important role in NASA’s space program starting with the Gemini space program. However, improved fuel cell performance will be needed to enable demanding future missions. An advanced fuel cell (FC) using liquid fuel and oxidizer is being developed by U of IL/NPL team to provide air independence and to achieve higher power densities than normal H2/O2 fuel cells (Lou et al., 2008; Miley, 2007). Hydrogen peroxide (H2O2) is used in this FC directly at the cathode (Lou and Miley, 2004). Either of two types of reactant, namely a gas‐phase hydrogen or an aqueous NaBH4 solution, is utilized as fuel at the anode. Experiments with both 10‐W single cells and 500‐W stacks demonstrate that the direct utilization of H2O2 and NaBH4 at the electrodes result in >30% higher voltage output compared to the ordinary H2/O2 FC (Miley, 2007). Further, the use of this combination of all liquid fuels provides—from an operational point of view—significant advantages (ease of storage, reduced pumping requirements, simplified heat removal). This design is inherently compact compared to other fuel cells that use gas phase reactants. This results in a high overall system (including fuel tanks, pumps and piping, waste heat radiator) power density. Further, work is in progress on a regenerative version which uses an electrical input, e.g. from power lines or a solar panel to regenerate reactants.


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    Title :

    Advanced NaBH4/H2O2 Fuel Cell for Space Applications


    Contributors:

    Conference:

    SPACE, PROPULSION & ENERGY SCIENCES INTERNATIONAL FORUM: SPESIF‐2009 ; 2009 ; Huntsville (Alabama)


    Published in:

    AIP Conference Proceedings ; 1103 , 1 ; 157-163


    Publication date :

    2009-03-16


    Size :

    7 pages





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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