Semi-Polycrystalline–Polyaniline Empowered Electrochemical Capacitor

Neelima Mahato, Debananda Mohapatra, Moo Hwan Cho and Kwang Soon Ahn
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Neelima Mahato: School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Gyeongsangbuk-do, Korea
Debananda Mohapatra: School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Gyeongsangbuk-do, Korea
Moo Hwan Cho: School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Gyeongsangbuk-do, Korea
Kwang Soon Ahn: School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Gyeongsangbuk-do, Korea

Energies, 2022, vol. 15, issue 6, 1-36

Abstract: We report on the formation of semi-polycrystalline polyaniline, a novel electroactive polymeric material synthesized by a modified surfactant-free chemical route and its enhanced electrochemical capacitive behavior. The material exhibits uniformly arranged spindle-shaped morphology in scanning electron microscopy and well-defined crystallographic lattices in the high-resolution transmission electron microscopy images. The X-ray diffraction spectrum reveals sharp peaks characteristic of a crystalline material. The characteristic chemical properties of polyaniline are recorded using Fourier transform infrared technology and laser Raman spectroscopies. The cyclic voltammetry curves exhibit features of surface-redox pseudocapacitance. The specific capacitance calculated for the material is 551 F g −1 at a scan rate of 10 mV s −1 . The cycle stability and the coulombic efficiency recorded at a current density of 12 A g −1 exhibited good stability (90.3% and 99.5%, respectively) over 3000 cycles.

Keywords: polyaniline; semi-polycrystalline polyaniline; electroactive material; electrochemical capacitor; pseudocapacitor; galvanostatic charge–discharge (GCD) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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