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Vanadium Oxygen Fuel Cell Utilising High Concentration Electrolyte

 
: Risbud, Mandar; Menictas, Chris; Skyllas-Kazacos, Maria; Noack, Jens

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Volltext ()

Batteries 5 (2019), Nr.1, Art. 24, 19 S.
ISSN: 2313-0105
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer ICT ()

Abstract
A vanadium oxygen fuel cell is a modified form of a conventional vanadium redox flow battery (VRFB) where the positive electrolyte (VO2+/VO2+ couple) is replaced by the oxygen reduction (ORR) process. This potentially allows for a significant improvement in energy density and has the added benefit of overcoming the solubility limits of V (V) at elevated temperatures, while also allowing the vanadium negative electrolyte concentration to increase above 3 M. In this paper, a vanadium oxygen fuel cell with vanadium electrolytes with a concentration of up to 3.6 M is reported with preliminary results presented for different electrodes over a range of current densities. Using precipitation inhibitors, the concentration of vanadium can be increased considerably above the commonly used 2 M limit, leading to improved energy density.

: http://publica.fraunhofer.de/dokumente/N-534759.html