Abstract
The spherical or plate-shaped polypyrrole (PPy) nanomaterials were prepared via the chemical oxidative polymerization of pyrrole in the presence of Acid Blue BRL (2-anthracenesulfonic acid, 4-[[4-(acetylmethylamino)phenyl]amino]-1-amino-9, 10-dihydro-9, 10-dioxo, monosodium salt) as both dopant and surfactant. Cyclic voltammetry, electrochemical AC impedance spectroscopy, and galvanostatic charge-discharge tests at various current densities were used to characterize the electrochemical characteristics of the PPy/Acid Blue BRL nanomaterials. A reversible 2e-/ 2H+ redox process was observed for all the PPy/Acid Blue BRL samples. The enhancement of UV-vis characteristic absorption of the π-π *transition of polypyrrole and thermostability of the samples was also observed, due to the doping reaction. The flake-shaped PPy/Acid Blue BRL sample exhibited the highest electrical conductivity of 8.33Scm-1 and the highest specific capacitance of 514Fg-1. The electrochemical data indicated that the formation of the plate-shaped structure of the PPy/Acid Blue BRL nanomaterials improved the electrochemical properties of PPy.
| Original language | English |
|---|---|
| Pages (from-to) | 901-908 |
| Number of pages | 8 |
| Journal | Powder Technology |
| Volume | 235 |
| DOIs | |
| State | Published - Feb 2013 |
| Externally published | Yes |
Keywords
- Anthraquinone derivatives
- Chemical oxidative polymerization
- Flake-like morphology
- Polypyrrole
- Supercapacitors
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