Journal article
Pseudocapacitance and performance stability of quinone-coated carbon onions
Nano energy, v 2(5), pp 702-712
Sep 2013
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Onion-like carbon, also known as carbon onions, is a highly conductive material enabling supercapacitor electrodes with a very high power density. However, the moderate specific capacitance (circa 30F/g) is insufficient for many energy storage applications. In our study, we show how decoration of carbon onions with quinones provides a facile method to increase the energy density up to one order of magnitude, namely, from 0.5Wh/kg to 4.5Wh/kg, while retaining a high power density and long lifetime. We present data for carbon onions modified with three different kinds of quinones: 1,4-naphthoquinone, 9,10-phenanthrenequinone, and 4,5-pyrenedione. Quinone-decorated carbon onion electrodes are investigated considering the actual quinone loading and the resulting electrochemical performance is probed in 1M H2SO4 as the electrolyte using cyclic voltammetry and galvanostatic charge/discharge. The maximum capacitance, 264F/g, is found for carbon onions modified with 4,5-pyrenedione, which also shows the smallest fade in specific capacitance, namely 3%, over 10,000 charge and discharge cycles at a high current density of 1.3A/g.
Quinone modification of carbon onions is presented as a facile way to significantly improve the energy density of carbon electrodes composed of onion-like carbon. A high capacitance of up to 264F/g was identified which corresponds to 4.5Wh/kg. A stable performance over thousands of charge and discharge cycles was demonstrated. [Display omitted]
•Presentation of a facile technique to significantly increase the specific capacitance of carbon-onion based supercapacitor electrodes.•Highest so far reported specific capacitance of a carbon-onion based electrode (264F/g in 1M H2SO4).•Small fade in specific gravimetric capacitance, namely 3%, after 10,000 charge and discharge cycles at a high current density of 1.3A/g.
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Details
- Title
- Pseudocapacitance and performance stability of quinone-coated carbon onions
- Creators
- Daniela M Anjos - Oak Ridge National Laboratory, Oak Ridge, TN 37831, United StatesJohn K McDonough - A.J. Drexel Nanotechnology Institute & Department of Materials Science and Engineering, Drexel University, PA 19104, Philadelphia, United StatesEmilie Perre - INM – Leibniz Institute for New Materials, Energy Materials Group & Saarland University, 66123 Saarbrücken, GermanyGilbert M Brown - Oak Ridge National Laboratory, Oak Ridge, TN 37831, United StatesSteven H Overbury - Oak Ridge National Laboratory, Oak Ridge, TN 37831, United StatesYury Gogotsi - A.J. Drexel Nanotechnology Institute & Department of Materials Science and Engineering, Drexel University, PA 19104, Philadelphia, United StatesVolker Presser - INM – Leibniz Institute for New Materials, Energy Materials Group & Saarland University, 66123 Saarbrücken, Germany
- Publication Details
- Nano energy, v 2(5), pp 702-712
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000326134200014
- Scopus ID
- 2-s2.0-84884176310
- Other Identifier
- 991014969872504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied