Journal article
Capacitance, charge dynamics, and electrolyte-surface interactions in functionalized carbide-derived carbon electrodes
Progress in natural science, v 25(6), pp 631-641
Dec 2015
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
This study analyzed the dynamics of ionic liquid electrolyte inside of defunctionalized, hydrogenated, and aminated pores of carbide-derived carbon supercapacitor electrodes. The approach tailors surface functionalities and tunes nanoporous structures to decouple the influence of pore wall composition on capacitance, ionic resistance, and long-term cyclability. Quasi-elastic neutron scattering probes the self-diffusion properties and electrode-ion interactions of electrolyte molecules confined in functionalized pores. Room-temperature ionic liquid interactions in confined pores are strongest when the hydrogen-containing groups are present on the surface. This property translates into higher capacitance and greater ion transport through pores during electrochemical cycling. Unlike hydrogenated pores, aminated pores do not favorably interact with ionic liquid ions and, subsequently, are outperformed by defunctionalized surfaces.
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Details
- Title
- Capacitance, charge dynamics, and electrolyte-surface interactions in functionalized carbide-derived carbon electrodes
- Creators
- Boris Dyatkin - Department of Materials Science & Engineering and A.J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USAEugene Mamontov - Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USAKevin M Cook - Department of Materials Science & Engineering and A.J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USAYury Gogotsi - Department of Materials Science & Engineering and A.J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USA
- Publication Details
- Progress in natural science, v 25(6), pp 631-641
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000368771900013
- Scopus ID
- 2-s2.0-84956965629
- Other Identifier
- 991014969854104721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary