Vanadium Oxygen Fuel Cell Utilising High Concentration Electrolyte
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 19, 2019
- Source ID
- 10.3390/batteries5010024
Entities
People
- Chris Menictas
- Jens Noack
- Mandar Risbud
- Maria Skyllas-kazacos
Organizations
- Office of Naval Research Global