Bandyopadhyay, Parthasarathi and Kuila, Tapas and Balamurugan, Jayaraman and Nguyen, Thanh Tuan and Kim, Nam Hoon and Lee, Joong Hee (2017) Facile synthesis of novel sulfonated polyaniline functionalized graphene using m-aminobenzene sulfonic acid for asymmetric supercapacitor application. Chemical Engineering Journal, 308. pp. 1174-1184.

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Sulfonated polyaniline (SPANI) functionalized reduced graphene oxide (SPANI/G-1) was prepared by aniline initiated polymerization of m-aminobenzene sulfonic acid in presence of graphene oxide (GO), followed by reduction with hydrazine hydrate. Fourier transform infrared, Raman, and X-ray photoelectron spectroscopy analyses confirmed successful surface modification of graphene using SPANI. The presence of sulfonic acid groups in SPANI accelerated the redox reaction and provided pseudocapacitance. SPANI/G-1 based electrode showed high specific capacitance of 1107 F g−1 at a current density of 1 A g−1 in a three electrode set up. An asymmetric supercapacitor (ASC) device was fabricated using SPANI/G-1 as positive electrode and chemically reduced GO (RGO) as a negative electrode. ASC showed specific capacitance of 157 F g−1 at a current density of 1.5 A g−1 and 94% retention in specific capacitance after 5000 charge-discharge cycles at a current density of 3.8 A g−1. The ASC exhibited maximum energy density of 31.4 W h kg−1 and a large power density of 14,764 W kg−1. Nyquist data of the device was fitted with Z-view and different components (solution resistance, charge-transfer resistance and Warburg elements) were calculated from the fitted curve.

Item Type: Article
Subjects: Supercapacitor
Depositing User: Dr. Sarita Ghosh
Date Deposited: 13 Mar 2019 07:35
Last Modified: 13 Mar 2019 07:35

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