Journal article
Reticulated Carbon Electrodes for Improved Charge Transport in Electrochemical Flow Capacitors
Journal of the Electrochemical Society, v 165(11), pp A2519-A2527
Jan 2018
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In this study, we report on an approach to flow cell design that can enable a significantly improved power output (∼10x) for electrochemical flow capacitors (EFCs), even at large flow channel gaps. Reticulated vitreous carbon (RVC) electrodes of various average pore sizes (0.43-2 mm) were integrated into EFC flow cell fixtures with channel gaps of 5 mm. Electrochemical testing under flow conditions showed a 10-fold improvement in the power density with the RVC integration (290 W/m2, 580 W/kg) for the same slurry composition. This improvement was mostly attributed to the presence of a 3D porous electrode insert (i.e., RVC) that shortened the travel distance of the electrons to the current collectors. Pressure drop in the RVC containing cells was also investigated and found to increase up to 30% depending on the pore size. However, this increase was found to be offset by the increase in the channel depth, yielding almost no change in pressure as compared to conventional narrow-gap (>0.75 mm) flow channels. RVCs having an average pore size of 0.55 mm showed the best performance out of all studied cases with improved coulombic efficiency and good specific capacity (85 F/g) under flowing conditions.
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Details
- Title
- Reticulated Carbon Electrodes for Improved Charge Transport in Electrochemical Flow Capacitors
- Creators
- Bilen Akuzum - Drexel University A. J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, , USADeborah D Hudson - Drexel University Electrochemical Energy Systems Laboratory, Department of Mechanical Engineering Mechanics, , USADevon A Eichfeld - Drexel University Electrochemical Energy Systems Laboratory, Department of Mechanical Engineering Mechanics, , USAChristopher R Dennison - Drexel University Electrochemical Energy Systems Laboratory, Department of Mechanical Engineering Mechanics, , USALutfi Agartan - Drexel University Electrochemical Energy Systems Laboratory, Department of Mechanical Engineering Mechanics, , USAYury Gogotsi - Drexel University A. J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, , USAE. Caglan Kumbur - Drexel University Electrochemical Energy Systems Laboratory, Department of Mechanical Engineering Mechanics, , USA
- Publication Details
- Journal of the Electrochemical Society, v 165(11), pp A2519-A2527
- Publisher
- The Electrochemical Society
- Number of pages
- 9
- Grant note
- 1351161 / National Science Foundation (NSF) (http://dx.doi.org/10.13039/100000001)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000442073200002
- Scopus ID
- 2-s2.0-85067391030
- Other Identifier
- 991014969868104721
UN Sustainable Development Goals (SDGs)
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Electrochemistry
- Materials Science, Coatings & Films