Journal article
Highly porous carbon spheres for electrochemical capacitors and capacitive flowable suspension electrodes
Carbon (New York), v 77, pp 155-164
Oct 2014
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In flowable and conventional electrochemical capacitors, the energy capacity is largely determined by the electrode material. Spherical active material, with high specific surface area (SSA) represents a promising material candidate for film and flow capacitors. In this study, we synthesized highly porous carbon spheres (CSs) of submicrometer size to investigate their performance in film and suspension electrodes. In particular, we studied the effects of carbonization and activation temperatures on the electrochemical performance of the CSs. The CSs activated at optimum conditions demonstrated narrow pore size distribution (<3nm) with high SSA (2900m2/g) and high pore volume (1.3cc/g), which represent significant improvement as compared to similar materials reported in literature. Electrochemical tests of CSs in 1M H2SO4 solution showed a specific capacitance of 154 F/g for suspension electrode and 168 F/g for film electrode with excellent rate performance (capacitive behaviors up to 100mV/s) and cycling performance (95% of initial capacitance after 5000 cycles). Moreover, in the film electrode configuration, CSs exhibited high rate performance (78 F/g at 1000mV/s) and volumetric power density (9000W/L) in organic electrolytes, along with high energy density (21.4Wh/L) in ionic liquids.
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Details
- Title
- Highly porous carbon spheres for electrochemical capacitors and capacitive flowable suspension electrodes
- Creators
- Chuanfang Zhang - State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaKelsey B Hatzell - A.J. Drexel Nanomaterials Institute, Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USAMuhammad Boota - A.J. Drexel Nanomaterials Institute, Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USABoris Dyatkin - A.J. Drexel Nanomaterials Institute, Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USAMajid Beidaghi - A.J. Drexel Nanomaterials Institute, Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USADonghui Long - State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaWenming Qiao - State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaEmin C Kumbur - Electrochemical Energy Systems Laboratory, Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA 19104, USAYury Gogotsi - A.J. Drexel Nanomaterials Institute, Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA
- Publication Details
- Carbon (New York), v 77, pp 155-164
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000340689400018
- Scopus ID
- 2-s2.0-84905663879
- Other Identifier
- 991014969875604721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary