Abstract
Multi-walled carbon nanotubes (MWNTs)/polyaniline (PANI) composite materials were prepared by in-situ chemical oxidative polymerization of an aniline solution containing well-dispersed MWNTs. The supercapacitive behaviors of these composite materials were investigated with cyclic voltammetry (CV), charge–discharge tests, and ac impedance spectroscopy, respectively. The composites based on the charge-transfer complex between well-dispersed MWNTs and PANI matrixes show much higher specific capacitance, better thermal stability, lower resistance, and were more promising for applications in supercapacitors than a pure PANI electrode. The highest specific capacitance value of 224 Fg−1 was obtained for the MWNTs/PANI composite materials containing MWNTs of 0.8 wt%. The improvement mechanisms of the capacitance of the composite materials were also discussed in detail.
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The authors acknowledge the financial support by the National Natural Science Foundation of China (No. 50602020) and the National Basic Research Program of China (No. 2007CB216408).
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Kong, LB., Zhang, J., An, JJ. et al. MWNTs/PANI composite materials prepared by in-situ chemical oxidative polymerization for supercapacitor electrode. J Mater Sci 43, 3664–3669 (2008). https://doi.org/10.1007/s10853-008-2586-1
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DOI: https://doi.org/10.1007/s10853-008-2586-1