The preparation and performance of flocculent polyaniline/carbon nanotubes composite electrode material for supercapacitors |
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Authors: | Liping Zheng Xianyou Wang Hongfang An Xingyan Wang Lanhuan Yi Li Bai |
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Affiliation: | (1) School of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of Minister of Education, Xiangtan University, Hunan, 411105, China; |
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Abstract: | Polyaniline (PANI)/carbon nanotubes (CNTs) composite electrode material was prepared by in situ chemical polymerization. The structure and morphology of PANI/CNTs composite are characterized by Fourier infrared spectroscopy, scanning electron microscope, and transmission electron microscopy. It has been found that a flocculent PANI was uniformly deposited on the surface of CNTs. The supercapacitive behaviors of the PANI/CNTs composite materials are investigated with cyclic voltammetry, galvanostatic charge/discharge, impedance, and cycle life measurements. The results show that the PANI/CNTs composite electrodes have higher specific capacitances than CNT electrodes and better stability than the conducting polymers. The capacitance of PANI/CNTs composite electrode is as high as 837.6 F g−1 measured by cyclic voltammetry at 1 mV s−1. Besides, the capacitance retention of coin supercapacitors remained 68.0% after 3,000 cycles. |
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