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Nano Lett. 2012 Jul 11;12(7):3756-60. doi: 10.1021/nl301601y. Epub 2012 Jun 20.

Energy storage in ultrathin solid oxide fuel cells.

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Harvard School of Engineering and Applied Sciences, Cambridge, Massachusetts 02138, United States.


The power output of hydrogen fuel cells quickly decreases to zero if the fuel supply is interrupted. We demonstrate thin film solid oxide fuel cells with nanostructured vanadium oxide anodes that generate power for significantly longer time than reference porous platinum anode thin film solid oxide fuel cells when the fuel supply is interrupted. The charge storage mechanism was investigated quantitatively with likely identified contributions from the oxidation of the vanadium oxide anode, its hydrogen storage properties, and different oxygen concentration at the electrodes. Fuel cells capable of storing charge even for short periods of time could contribute to ultraminiaturization of power sources for mobile energy.


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