Semi-Polycrystalline–Polyaniline Empowered Electrochemical Capacitor

Energies

Moo Hwan Cho¹  Neelima Mahato¹  Debananda Mohapatra¹  Kwang Soon Ahn¹ 

[1] School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Gyeongsangbuk-do, Korea;

关键词: polyaniline;    semi-polycrystalline polyaniline;    electroactive material;    electrochemical capacitor;    pseudocapacitor;    galvanostatic charge–discharge (GCD);   

DOI  :  10.3390/en15062001

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown