The nano-biocomposite electrodes composed of carbon nanotube (CNT), polypyrrole (PPy), and -bacteria were investigated for electrochemical supercapacitors. For this purpose, PPy/CNT- was successfully synthesized through oxidative polymerization. The PPy/CNT- electrode exhibited a high specific capacitance of 173 F∙g at the current density of 0.2 A∙g, which is much higher than that (37 F∙g) of CNT. Furthermore, it displayed sufficient stability after 1000 charge/discharge cycles. The CNT, PPy/CNT, and PPy/CNT- composites were characterized by x-ray diffraction, scanning electron microscopy, and surface analyzer (Brunauer-Emmett-Teller, BET). In particular, the pyrrole monomers were easily adsorbed and polymerized on the surface of CNT materials, as well as bacteria enhanced the surface area and porous structure of the PPy/CNT- composite electrode resulting in high performance of devices.
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| http://dx.doi.org/10.3390/ma15175804 | DOI Listing |
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