Supercapacitors from Free-Standing Polypyrrole/Graphene Nanocomposites

Author(s)
de Oliveira, Helinando P.; Sydlik, Stefanie Arlene; Swager, Timothy M
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Abstract
Interfacial/in situ oxidative polymerization of polypyrrole in the presence of functionalized graphene sheets produces high-quality composites for supercapacitors, as analyzed by electrochemical impedance spectroscopy and cyclic voltammetry analysis. The synergistic interaction induced by the growth of p-type polypyrrole on the surface of negatively charged carboxylate functionalized graphene sheets results in higher storage capacity than graphene-only or polymer-only films. The high conductivity of p-doped polypyrrole and high surface area of graphene promote high charge accumulation in capacitors. We report the optimization of the relative concentrations of carboxylate functionalized graphene in the polypyrrole matrix to maximize the composition’s capacitance to 277.8 F/g.
Date issued
2013-04
URI
http://hdl.handle.net/1721.1/86336
Department
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies; Massachusetts Institute of Technology. Department of Chemistry; Koch Institute for Integrative Cancer Research at MIT
Journal
The Journal of Physical Chemistry C
Publisher
American Chemical Society (ACS)
Citation
De Oliveira, Helinando P., Stefanie A. Sydlik, and Timothy M. Swager. “Supercapacitors from Free-Standing Polypyrrole/Graphene Nanocomposites.” The Journal of Physical Chemistry C 117, no. 20 (May 23, 2013): 10270–10276.
Version: Author's final manuscript
ISSN
1932-7447
1932-7455
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