Electrochemical Performance of Polypyrrole/Multi-Walled Carbon Nanotubes Composites for Supercapacitors Electrodes

Abstract:

Nanocomposites supercapacitors electrodes are synthesized by homogeneously coating the nano-structured polypyrrole (PPy) on multi-walled carbon nanotubes (MWCNTs) via a facile electrochemical method. The capacitance properties of the composites are evaluated by cyclic voltammetry (CV) and galvanostatic charge/discharge techniques. The results show that the porous composites structure exhibit a remarkable specific capacitance of 674 F g^-1 at a current density of 2 A g^-1. Electrochemical experiments indicate that the high specific capacitance is associated with uniform PPy coating. Moreover, the composites present a nearly ideal rectangular shape of cyclic voltammetry characteristics. The stability of the composites electrode is also examined and only 10% capacitance decrease after 800 cycles. This technique provides a feasible solution for developing high-performance electrical energy storage devices.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 1415-1418
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.1415
• Online since: November 2011
• Authors: Jing Li, Hua Qing Xie, Yang Li
• Keywords: Carbon Nanotube (CN), Electrochemical Performance, Polypyrrole, Super-Capacitor (SC)

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