Enriched Doping Level and Tuned Fiber Fractal Dimensions in Nonwoven Carbon‐Doped Polyaniline for Efficient Solid‐State Supercapacitors

Energy Technology - Tập 5 Số 2 - Trang 253-266 - 2017
Niraj Kumar1, Prasanta Kumar Sahoo2, H. S. Panda1
1Department of Materials Engineering, Defence Institute of Advanced Technology, Girinagar, Pune 411025, India
2Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India

Tóm tắt

AbstractNonwoven fibrous mats of polyaniline/carbon black on conducting substrates are synthesized through a two‐step oxidative process. Adsorbed and catalyzed aniline monomers in the synthesis process improved the doping degree (0.381) in the hybrid fibers. The formation of a porous mat on substrates was confirmed by using electron microscopy and small‐angle X‐ray scattering. The fractal dimensions of the fibers are correlated with Porod's law and suggest the presence of a nonfractal structure in the PCN1 mat. The hybrid mat exhibited a high porosity and effective surface area, even interfaces, and conductive pathways for the electrode/electrolyte to improve the kinetic process. Electrochemical measurements have been conducted on developed fibers, which showed a high specific capacitance of around 1526 F g−1, excellent cyclic stability, and elevated energy density (212 Wh kg−1) after doping carbon into polyaniline (PANI). Additionally, a symmetric solid‐state supercapacitor device was fabricated, a capacitance around 270 F g−1 was measured, and it was able to light a commercial light‐emitting diode (LED).

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Energy Technology

Tập 5 Số 2

253-266

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