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Nitrogen-doped carbon “spider webs” derived from pyrolysis of polyaniline nanofibers in ammonia for capacitive energy storage
Published online by Cambridge University Press: 07 December 2017
Abstract
Heteroatom-doped carbon materials have attracted immense interest as advanced supercapacitor electrode materials due to their unique properties. A carbon cloth-supported, nitrogen-doped carbon “spider web” network full of macropores and mesopores is developed via the pyrolysis of polyaniline nanofibers in ammonia atmosphere. The presence of mesopores and macropores can provide ion-buffering reservoirs to shorten the ion diffusion distance to the interior part of the carbon network. Carbonization in ammonia introduced N heteroatoms through gas phase chemical reactions between ammonia and the oxygen functionalities on the carbon surface. The enhanced ion-accessible surface area and improved charge transfer rate can be achieved. The N-doped carbon “spider web” exhibited a high specific capacitance of 266 F/g at a scan rate of 2 mV/s. Even when the scan rate was increased to 500 mV/s, 61% of its capacitance could still be retained, evidencing its excellent rate performance. The demonstrated strategy is anticipated to be generally effective for preparing heteroatom-doped carbon electrodes with other polymers.
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- Invited Article
- Information
- Journal of Materials Research , Volume 33 , Issue 9: Focus Issue: Porous Carbon and Carbonaceous Materials for Energy Conversion and Storage , 14 May 2018 , pp. 1109 - 1119
- Copyright
- Copyright © Materials Research Society 2017
Footnotes
These authors contributed equally to this work.
This author was an editor of this journal during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/editor-manuscripts/.
Contributing Editor: Marcus A. Worsley
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