Abstract
A polypyrrole (PPy)/multi-walled carbon nanotube (MWCNT)/cotton flexible electrode for high-performance supercapacitors was fabricated by a facile two-step method, including MWCNT-coated cotton prepared by a facile “dip and dry” method and then subjected to the electro-deposition of PPy by a potentiostatic deposition technique. The effects of deposition potential, time, and molar ratio of p-toluenesulfonic acid to pyrrole (Py) on the properties of textile electrodes were studied. The sheet resistances and surface morphologies of the as-prepared composite fabrics obtained under different conditions were investigated by means of a four-point probe method and field-emission scanning electron microscope and the electrochemical performances of the PPy/MWCNT/cotton electrodes were evaluated by cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy measurements. These composite fabrics exhibited outstanding flexibility, high conductivity, with sheet resistance of 6.0 ± 0.4 Ω sq−1, a cauliflower structure with small holes on the surface favoring the contact between the electrode active material, a specific capacitance of 535 F g−1 (maintaining 97.8 % after 100 cycles), and a fitting value of charge-transfer resistance of 13.9 Ω cm−2, which offers great promise in wearable energy storage device applications because of their low-cost and high-performance features.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (51303022, 51203018) and the Shanghai Municipal Natural Science Foundation (12ZR1400400). The research was also funded by the Fundamental Research Funds for the Central Universities (2232015D3-17).
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Liu, C., Cai, Z., Zhao, Y. et al. Potentiostatically synthesized flexible polypyrrole/multi-wall carbon nanotube/cotton fabric electrodes for supercapacitors. Cellulose 23, 637–648 (2016). https://doi.org/10.1007/s10570-015-0795-8
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DOI: https://doi.org/10.1007/s10570-015-0795-8