Journal article
Influence of the structure of carbon onions on their electrochemical performance in supercapacitor electrodes
Carbon (New York), v 50(9), pp 3298-3309
Aug 2012
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Onion-like carbon (OLC), also known as carbon onions, is an attractive material for electrical energy storage in regards to high rate, high power applications. We report the most up to date, systematic, and extensive study of the electrochemical behavior of carbon onions in aqueous (1M sulfuric acid, H2SO4) and organic (1M tetraethylammonium tetrafluoroborate, TEA-BF4, and 1M tetrabutylammonium tetrafluoroborate, TBA-BF4, in acetonitrile) electrolytes. The physical and electrical properties of OLC are studied as a function of the synthesis temperature and compared with diamond soot, carbon black, and activated carbon. To obtain a molecular scale picture of the processes at the OLC-electrolyte interface, we supplement the experimental work with molecular dynamics (MD) simulations of carbon onions in organic electrolytes. The capacitive performance of OLC exceeds other carbon materials at high charge/discharge rates (up to 50Vs−1; time constant τ∼10ms). OLC produced from detonation soot has a performance similar to that of OLC from highly purified nanodiamond. While OLC produced at 1500°C has the largest specific surface area, OLC produced at 1800°C has the highest conductivity and shows the best capacitive performance at high rates.
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Details
- Title
- Influence of the structure of carbon onions on their electrochemical performance in supercapacitor electrodes
- Creators
- John K McDonough - Department of Materials Science and Engineering and A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104, USAAndrey I Frolov - Max Planck Institute for Mathematics in the Sciences, Inselstraße 22, D-04103 Leipzig, GermanyVolker Presser - Department of Materials Science and Engineering and A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104, USAJunjie Niu - Department of Materials Science and Engineering and A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104, USAChristopher H Miller - Department of Materials Science and Engineering and A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104, USATeresa Ubieto - Department of Materials Science and Engineering and A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104, USAMaxim V Fedorov - Max Planck Institute for Mathematics in the Sciences, Inselstraße 22, D-04103 Leipzig, GermanyYury Gogotsi - Department of Materials Science and Engineering and A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104, USA
- Publication Details
- Carbon (New York), v 50(9), pp 3298-3309
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000304644700023
- Scopus ID
- 2-s2.0-84860656282
- Other Identifier
- 991014877871204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary