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Open Access Highly Accessed Nano Review

Carbon Nanotubes for Supercapacitor

Hui Pan12*, Jianyi Li3 and YuanPing Feng1

Author Affiliations

1 Department of Physics, National University of Singapore, Singapore, 117542, Singapore

2 Institute of High Performance Computing, 1 Fusionopolis Way, Singapore, 138632, Singapore

3 Institute of Chemical and Engineering Sciences, 1 Pesek Road, Jurong Island, Singapore, 627833, Singapore

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Nanoscale Research Letters 2010, 5:654-668  doi:10.1007/s11671-009-9508-2

Published: 5 January 2010

Abstract

As an electrical energy storage device, supercapacitor finds attractive applications in consumer electronic products and alternative power source due to its higher energy density, fast discharge/charge time, low level of heating, safety, long-term operation stability, and no disposable parts. This work reviews the recent development of supercapacitor based on carbon nanotubes (CNTs) and their composites. The purpose is to give a comprehensive understanding of the advantages and disadvantages of carbon nanotubes-related supercapacitor materials and to find ways for the improvement in the performance of supercapacitor. We first discussed the effects of physical and chemical properties of pure carbon nanotubes, including size, purity, defect, shape, functionalization, and annealing, on the supercapacitance. The composites, including CNTs/oxide and CNTs/polymer, were further discussed to enhance the supercapacitance and keep the stability of the supercapacitor by optimally engineering the composition, particle size, and coverage.

Keywords:
Carbon nanotubes; Supercapacitor; Oxide/nanotube composite; Polymer/nanotube composite