Supercapacitors from Free-Standing Polypyrrole/Graphene Nanocomposites

被引：145

作者：

de Oliveira, Helinando P. ^{[1
,2
,3
]}

Sydlik, Stefanie A. ^{[1
,2
]}

Swager, Timothy M. ^{[1
,2
]}

机构：

[1] MIT, Dept Chem, Cambridge, MA 02139 USA

[2] MIT, Inst Soldier Nanotechnol, Cambridge, MA 02139 USA

[3] Univ Fed Vale Sao Francisco, Inst Pesquisa Ciencia Mat, BR-48902300 Juazeiro, BA, Brazil

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2013年 / 117卷 / 20期

关键词：

REDUCED GRAPHENE OXIDE; ELECTROCHEMICAL PROPERTIES; COMPOSITE ELECTRODES; PERFORMANCE; FABRICATION; CAPACITANCE; POLYMERIZATION; REARRANGEMENT; TEMPERATURE; FILMS;

D O I：

10.1021/jp400344u

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：10270 / 10276

页数：7

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