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- W2171878500 abstract "We report the fast charging/discharging capability of poly(3,4-ethylenedioxythiophene) (PEDOT) nanotubes during the redox process and their potential application to a high-powered supercapacitor. PEDOT nanotubes were electrochemically synthesized in a porous alumina membrane, and their structures were characterized using electron microscopes. Cyclic voltammetry was used to characterize the specific capacitance of the PEDOT nanotubes at various scan rates. A type I supercapacitor (two symmetric electrodes) based on PEDOT nanotube electrodes was fabricated, and its energy density and power density were evaluated by galvanostatic charge/discharge cycles at various current densities. We show that the PEDOT-nanotube-based supercapacitor can achieve a high power density of 25 kW kg−1 while maintaining 80% energy density (5.6 W h kg−1). This high power capability is attributed to the fast charge/discharge of nanotubular structures: hollow nanotubes allow counter-ions to readily penetrate into the polymer and access their internal surfaces, while the thin wall provides a short diffusion distance to facilitate the ion transport. Impedance spectroscopy shows that nanotubes have much lower diffusional resistance to charging ions than solid nanowires shielded by an alumina template, providing supporting information for the high charging/discharging efficiency of nanotubular structures." @default.
- W2171878500 created "2016-06-24" @default.
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- W2171878500 date "2008-04-23" @default.
- W2171878500 modified "2023-10-18" @default.
- W2171878500 title "Poly(3,4-ethylenedioxythiophene) nanotubes as electrode materials for a high-powered supercapacitor" @default.
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- W2171878500 doi "https://doi.org/10.1088/0957-4484/19/21/215710" @default.
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