g-C3N4/CuO and g-C3N4/Co3O4 nanohybrid structures as efficient electrode materials in symmetric supercapacitors |
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| Authors: | Jithesh Kavil P. M. Anjana Deepak Joshy Ameya Babu Govind Raj P. Periyat R. B. Rakhi |
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| Affiliation: | Department of Chemistry, University of Calicut, Kerala India-673635.; Chemical Sciences and Technology Division, CSIR-National Institute of Interdisciplinary Sciences (CSIR-NIIST), Thiruvananthapuram Kerala India, 695019 ; Department of Physics, University of Kerala, Thiruvananthapuram Kerala India, 695019 ; Department of Chemistry, Malabar Christian College, Calicut Kerala India-673635 |
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| Abstract: | Metal oxide dispersed graphitic carbon nitride hybrid nanocomposites (g-C3N4/CuO and g-C3N4/Co3O4) were prepared via a direct precipitation method. The materials were used as an electrode material in symmetric supercapacitors. The g-C3N4/Co3O4 electrode based device exhibited a specific capacitance of 201 F g−1 which is substantially higher than those using g-C3N4/CuO (95 F g−1) and bare g-C3N4 electrodes (72 F g−1). At a constant power density of 1 kW kg−1, the energy density given by g-C3N4/Co3O4 and g-C3N4/CuO devices is 27.9 W h kg−1 and 13.2 W h kg−1 respectively. The enhancement of the electrochemical performance in the hybrid material is attributed to the pseudo capacitive nature of the metal oxide nanoparticles incorporated in the g-C3N4 matrix.Comparison of electrochemical performance of symmetric supercapacitors based on g-C3N4/CuO and g-C3N4/Co3O4 electrodes. |
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