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.
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors gratefully acknowledge the financial support from BK 21 PLUS, Creative Human Resource Development Program for IT Convergence, Pusan National University, Busan, South Korea. Also, this work was supported by UAEU Program for Advanced Research (UPAR) under grant No. 31S312.