Integrated manufacturing of REciclable multi-material COmposites for the TRANSport sector

Here, low body comparison of g?C3N4/C is synthesized on the surface of biochar by template induction. Then the petal?like Ni(OH)2 is loaded on g?C3N4/C by hydrothermal method. g?C3N4/C can provide a vertical charge transport channel to increase the reaction potential of the material during charging and discharging. The composites have excellent electrochemical properties.Nickel hydroxide (Ni(OH)2) is recognized as a promising material for electrodes in supercapacitors owing to its exceptional theoretical specific capacitance. However, Ni(OH)2 has several drawbacks, including a short cycle life, susceptibility to volume expansion, and poor electrical conductivity. In this work, Ni(OH)2 nanosheets anchored on layered g?C3N4/C (Ni(OH)2–g–C3N4/C) are designed by biological template induction and a hydrothermal method. Ni(OH)2–g–C3N4/C has unique petal?like structures, which can provide a vertical charge transport channel to increase reaction potential of the material during the charge–discharge process. The introduction of biomass carbon can solve the problem of the bulk phase accumulation of g?C3N4 and can also improve the overall conductivity of the composite. Compared to Ni(OH)2 (522?F?g?1), g?C3N4/C (76.2?F?g?1), and g?C3N4 (16?F?g?1), the Ni(OH)2–g–C3N4/C?0.75 (NGC?0.75) composite exhibits the highest specific capacitance of 1034?F?g?1 at 1?A?g?1. Furthermore, after 5000 cycles at 5?A?g?1, the capacitance of the material is maintained at 85.97%. Meanwhile, the asymmetric supercapacitor based on the NGC?0.75 shows a high energy density of 18.29?Wh?kg?1 at the power density of 400.02?W?kg?1 with excellent cyclic stability of 127.45% over 10?000 cycles.

» Author: Fei Chen, Chengbao Liu, Leizhi Zheng, Feng Chen, Junchao Qian, Yongbin Qiu, Xianron Meng, Zhigang Chen

» Publication Date: 30/09/2024

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