Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Vanadium Oxygen Fuel Cell Utilising High Concentration Electrolyte

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

Fulltext ()

Batteries 5 (2019), No.1, Art. 24, 19 pp.
ISSN: 2313-0105
Journal Article, Electronic Publication
Fraunhofer ICT ()

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.