Novel porous carbon material derived from hypercross-linked polymer of p-xylene for supercapacitors electrode

Sang Hyo Kim, Rajangam Vinodh, Chandu V.V.Muralee Gopi, Venkata Guru Raghavendra Kummara, Sangaraju Sambasivam, Ihab M. Obaidat, Hee Je Kim

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12 Scopus citations

Abstract

Herein, we report for the first time the synthesis of porous carbon which is derived from hypercross-linking of p-xylene through Friedel-Crafts alkylation and subsequent carbonization at 800 °C for supercapacitor applications. The formation of hypercross-linking in p-xylene was confirmed by Fourier transform infra-red (FT-IR) spectroscopy. The synthesized materials, hypercross-linked p-xylene (HCP-pXy) and pyrolyzed HCP-pXy (HCP-pXy-800) were studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen sorption isotherm and powder x-ray diffraction (XRD) pattern. In a three-electrode system, HCP-pXy-800 electrode showed a specific capacitance of 242.5 F g−1 at a current density of 1.25 A g−1 in a 3 M KOH aqueous electrolyte. Furthermore, the specific capacitance at a current density of 1.2 5 A g−1 remained 95.18% after 2000 charge-discharge cycles and thus illustrating a predominant cyclic stability of the p-xylene derived porous carbon electrode.
Original languageEnglish (US)
Pages (from-to)127222
JournalMaterials Letters
Volume263
DOIs
StatePublished - Dec 23 2019

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