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Numerical studies of carbon paper-based vanadium redox flow batteries
- Source :
- Electrochimica Acta. 201:286-299
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- This study analyzed theoretically the effects of a carbon paper (CP)-based electrode on the performance of a vanadium redox flow battery (VRFB). Compared to conventional carbon felt-based electrode materials, the CP-based electrode showed superior characteristics in facilitating the redox reactions of VO2+/VO2+ and V2+/V3+ couples, such as better electrochemical activity and higher electronic conductivity. A three-dimensional, non-isothermal VRFB model developed in a previous study was applied to a range of single cell structures equipped with CP-based electrodes and flow channels in the current collectors. The model was then validated using the experimental data measured under the CP- and channel-based VRFB geometries. The model successfully captured the experimental trend that showed a higher discharging performance with increasing number of CP layers used for each electrode. The simulation results clearly showed that the activation overpotentials in the electrodes were reduced significantly using more CP layers, which dominated over the effects of increased mass transport limitation of vanadium ions due to the thicker electrode.
- Subjects :
- Standard hydrogen electrode
Chemistry
020209 energy
General Chemical Engineering
Inorganic chemistry
Analytical chemistry
Vanadium
chemistry.chemical_element
02 engineering and technology
Electrochemistry
Flow battery
Reference electrode
Redox
Ion
Electrode
0202 electrical engineering, electronic engineering, information engineering
Subjects
Details
- ISSN :
- 00134686
- Volume :
- 201
- Database :
- OpenAIRE
- Journal :
- Electrochimica Acta
- Accession number :
- edsair.doi...........e4bfae267ca23914ebe6092fb089e20e