Journal article
High power supercapacitor electrodes based on flexible TiC-CDC nano-felts
Journal of power sources, v 201, pp 368-375
2012
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
► Electrospun carbon TiC nano-felts can be used as binder-free supercapcitor electrodes. ► Capacitance scales with synthesis temperature (max: 135
F
g
−1 in H
2SO
4). ► Very high rate handling ability in aqueous and organic electrolytes.
Flexible electrospun titanium carbide (TiC) nano-felts were converted into carbide-derived carbon (CDC) by dry chlorination at temperatures between 200 and 1000
°C and used as binder-free supercapacitor electrodes. In the carbide nano-felt, TiC nano-crystals (20–30
nm) were embedded in a matrix of disordered carbon. After chlorination, the porous CDC nano-fibers/felts maintain their size, shape, and flexibility. With the increase of synthesis/chlorination temperature, the degree of carbon ordering increased. Electrochemical characterizations in 1
M H
2SO
4 and 1.5
M tetraethylammonium tetrafluoroborate in acetonitrile were carried out on binder-free electrodes with galvanostatic cycling, cyclic voltammetry, and electrochemical impedance spectroscopy. The highest gravimetric capacitance was identified for the CDC nano-felt synthesized at the highest temperature of 1000
°C, reaching 135
F
g
−1 in aqueous and 120
F
g
−1 in organic electrolytes. In contrast to powder or monolithic supercapacitor electrodes made of conventional activated, templated, or carbide-derived carbons, this material demonstrated excellent high-power handling ability; and ∼50% of the low-rate capacitance was maintained at a very high scan rate of 5
V
s
−1.
Metrics
Details
- Title
- High power supercapacitor electrodes based on flexible TiC-CDC nano-felts
- Creators
- Yu Gao - College of Chemistry, Jilin University, Changchun 130012, PR ChinaVolker Presser - Department of Materials Science and Engineering, A. J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, PA 19104, USALifeng Zhang - Department of Chemistry, South Dakota School of Mines and Technology, Rapid City, SD 57701, USAJun J Niu - Department of Materials Science and Engineering, A. J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, PA 19104, USAJohn K McDonough - Department of Materials Science and Engineering, A. J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, PA 19104, USACarlos R Pérez - Department of Materials Science and Engineering, A. J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, PA 19104, USAHaibo Lin - College of Chemistry, Jilin University, Changchun 130012, PR ChinaHao Fong - Department of Chemistry, South Dakota School of Mines and Technology, Rapid City, SD 57701, USAYury Gogotsi - Department of Materials Science and Engineering, A. J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, PA 19104, USA
- Publication Details
- Journal of power sources, v 201, pp 368-375
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000300264400049
- Scopus ID
- 2-s2.0-83655167015
- Other Identifier
- 991014970149204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Electrochemistry
- Energy & Fuels
- Materials Science, Multidisciplinary