Journal article
High rate capacitive performance of single-walled carbon nanotube aerogels
Nano energy, v 15, pp 662-669
Jul 2015
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Single-walled carbon nanotube (SWCNT) aerogels produced by critical-point-drying of wet-gel precursors exhibit unique properties, such as high surface-area-to-volume and strength-to-weight ratios. They are free-standing, are binder-free, and can be scaled to thicknesses of more than 1mm. Here, we examine the electric double layer capacitive behavior of these materials using a common room temperature ionic liquid electrolyte, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMI-TFSI). Electrochemical performance is assessed through galvanostatic cycling, cyclic voltammetry and impedance spectroscopy. Results indicate stable capacitive performance over 10,000 cycles as well as an impressive performance at high charge and discharge rates, due to accessible pore networks and enhanced electronic and ionic conductivities of SWCNT aerogels. These materials can find applications in mechanically compressible and flexible supercapacitor devices with high power requirements.
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•High-surface area single-walled carbon nanotube aerogel electrodes were synthesized.•Supercapacitors were assembled using a room temperature ionic liquid electrolyte.•Highly accessible surface leads to impressive rate performance up to 1V/s.•Supercapacitors show capacitive stability over 10,000 cycles.•Aerogels can be used as supercapacitor electrodes for high power applications.
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Details
- Title
- High rate capacitive performance of single-walled carbon nanotube aerogels
- Creators
- Katherine L Van Aken - Department of Materials Science and Engineering & A.J. Drexel Nanomaterials Institute, Drexel University, 3141 Chestnut Street, Philadelphia, PA, USACarlos R Pérez - Department of Materials Science and Engineering & A.J. Drexel Nanomaterials Institute, Drexel University, 3141 Chestnut Street, Philadelphia, PA, USAYoungseok Oh - Department of Materials Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213, USAMajid Beidaghi - Department of Materials Science and Engineering & A.J. Drexel Nanomaterials Institute, Drexel University, 3141 Chestnut Street, Philadelphia, PA, USAYeon Joo Jeong - Department of Materials Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213, USAMohammad F Islam - Department of Materials Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213, USAYury Gogotsi - Department of Materials Science and Engineering & A.J. Drexel Nanomaterials Institute, Drexel University, 3141 Chestnut Street, Philadelphia, PA, USA
- Publication Details
- Nano energy, v 15, pp 662-669
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000364578900064
- Scopus ID
- 2-s2.0-84930936219
- Other Identifier
- 991014970040704721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied