Journal article
Outstanding performance of activated graphene based supercapacitors in ionic liquid electrolyte from −50 to 80°C
Nano energy, v 2(n° 3), pp 403-411
May 2013
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
High specific surface area (SSA ∼2000 m2/g) porous KOH-activated microwave exfoliated graphite oxide (‘a-MEGO’) electrodes have been tested in a eutectic mixture of ionic liquids (1:1 by weight or molar ratio N-methyl-N-propylpiperidinium bis(fluorosulfonyl)imide (PIP13-FSI) and N-butyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (PYR14-FSI)) as electrolyte for supercapacitor applications. By optimizing the carbon/electrolyte system, outstanding capacitive performance has been achieved with high capacitance (up to 180 F/g) and wide electrochemical window (up to 3.5 V) over a wide temperature range from −50 °C to 80 °C. This is the first demonstration of a carbon–ionic liquid system capable of delivering capacitance in excess of 100 F/g below room temperature. The excellent electrochemical response of the proposed couple shows that optimization of the carbon/electrolyte interface is of great importance for improving capacitive energy storage.
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Details
- Title
- Outstanding performance of activated graphene based supercapacitors in ionic liquid electrolyte from −50 to 80°C
- Creators
- Wan-Yu Tsai - Centre interuniversitaire de recherche et d'ingenierie des matériauxRongying Lin - Centre interuniversitaire de recherche et d'ingenierie des matériauxShanthi Murali - University of Texas at Austin (UNITED STATES)Li Li Zhang - University of Texas at Austin (UNITED STATES)John K McDonough - Drexel UniversityRodney S Ruoff - University of Texas at Austin (UNITED STATES)Pierre-Louis Taberna - Centre interuniversitaire de recherche et d'ingenierie des matériauxYury Gogotsi - Drexel UniversityPatrice Simon - Centre interuniversitaire de recherche et d'ingenierie des matériaux
- Publication Details
- Nano energy, v 2(n° 3), pp 403-411
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000319845600014
- Scopus ID
- 2-s2.0-84877799809
- Other Identifier
- 991014969855104721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied