Journal article
Ultrahigh-power micrometre-sized supercapacitors based on onion-like carbon
Nature nanotechnology, v 5(9), pp 651-654
2010
PMID: 20711179
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Electrochemical capacitors, also called supercapacitors, store energy in two closely spaced layers with opposing charges, and are used to power hybrid electric vehicles, portable electronic equipment and other devices¹. By offering fast charging and discharging rates, and the ability to sustain millions of ²⁻⁵, electrochemical capacitors bridge the gap between batteries, which offer high energy densities but are slow, and conventional electrolytic capacitors, which are fast but have low energy densities. Here, we demonstrate microsupercapacitors with powers per volume that are comparable to electrolytic capacitors, capacitances that are four orders of magnitude higher, and energies per volume that are an order of magnitude higher. We also measured discharge rates of up to 200 V s⁻¹, which is three orders of magnitude higher than conventional supercapacitors. The microsupercapacitors are produced by the electrophoretic deposition of a several micrometre-thick layer of nanostructured carbon onions⁶‚⁷ with diameters of 6-7 nm. Integration of these nanoparticles in a microdevice with a high surface-to-volume ratio, without the use of organic binders and polymer separators, improves performance because of the ease with which ions can access the active material. Increasing the energy density and discharge rates of supercapacitors will enable them to compete with batteries and conventional electrolytic capacitors in a number of applications.
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Details
- Title
- Ultrahigh-power micrometre-sized supercapacitors based on onion-like carbon
- Creators
- David Pech - Équipe Intégration de Systèmes de Gestion de l'ÉnergieMagali Brunet - Équipe Intégration de Systèmes de Gestion de l'ÉnergieHugo Durou - Équipe Nano Ingénierie et Intégration des SystèmesPeihua Huang - Équipe Intégration de Systèmes de Gestion de l'ÉnergieVadym Mochalin - Department of Materials Science and Engineering (Philadelphia, USA)Yury Gogotsi - Department of Materials Science and Engineering (Philadelphia, USA)Pierre-Louis Taberna - Centre interuniversitaire de recherche et d'ingenierie des matériauxPatrice Simon - Centre interuniversitaire de recherche et d'ingenierie des matériaux
- Publication Details
- Nature nanotechnology, v 5(9), pp 651-654
- Publisher
- Nature Publishing Group
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000281603400010
- Other Identifier
- 991014878229504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology