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        Fe/Co doped ZIF derived nitrogen doped nanoporous carbon as electrode material for supercapacitors

        Ifra Fiaz Gul,Hirra Anwar,Muhammad Arslan Raza,Rabia Ahmad,Naseem Iqbal,Ghulam Ali 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.116 No.-

        Nanoporous carbon (NPC) for electrochemical energy storage devices has gained much interest due to itshigh specific area and tunable porosity. Herein, Fe and Co co-doped NPC is synthesized by a simple coprecipitationmethod followed by carbonization of Fe and Co doped ZIF8 at 900 ℃ (Fe-Co/NPC-900). The structural, morphological, elemental, chemical bonding, surface area, and thermal degradation ofthe synthesized material have been evaluated using X-ray diffraction, scanning electron microscopy,energy dispersive spectroscopy, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller method,and thermogravimetric analysis, respectively. The high surface area of 933 m2/g and nanoporous structureof Fe-Co/NPC-900 electrode results in a high specific capacitance of 900 F/g at a current density of5 A/g. The cycle performance of Fe-Co/NPC-900 was remarkable with 88% of the capacitance retentionafter 5000 cycles at a high current density of 30 A/g. The high electrochemical performance of Fe-Co/NPC-900 is attributed to the hybrid doping of Fe and Co in nitrogen doped carbon network which offersa synergic effect in reaction.

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