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Abstract <p>In the present work, NiCo<sub>2</sub>O<sub>4</sub> and NiCo<sub>2</sub>O<sub>4</sub>/rGO nanocomposites were synthesized by using hydrothermal method. Thermogravimetric analysis (TGA) reveals that NiCo<sub>2</sub>O<sub>4</sub>/rGO was more stable as compared to NiCo<sub>2</sub>O<sub>4</sub>. Electrochemical studies reveal that the NiCo<sub>2</sub>O<sub>4</sub>/rGO exhibits high specific capacitance of 1960 F/g in comparison with NiCo<sub>2</sub>O<sub>4</sub> of 870 F/g. NiCo<sub>2</sub>O<sub>4</sub>/rGO has energy density of 300 W h/kg at low power density and ultra high power density of 18.74 kW/kg at low energy density. Incorporation of reduced graphene oxide increases the specific capacitance, energy density and power density of the electrode material. The SEM micrographs reveal the formation of cabbage-like structure of the nanocomposite. These results of NiCo<sub>2</sub>O<sub>4</sub>/rGO have drawn increasing attention as the latter is a promising electrode material for high performance supercapacitors.</p>

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Cabbage-Like NiCo2O4/rGO Nanocomposites: Boosting Capacitance and Power Density for Next-Generation Supercapacitors

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • Bandana Jadawn,
  • Pukhrambam Dipak,
  • Rajendra Kumar Tiwari,
  • Radha Tomar

摘要

Abstract

In the present work, NiCo2O4 and NiCo2O4/rGO nanocomposites were synthesized by using hydrothermal method. Thermogravimetric analysis (TGA) reveals that NiCo2O4/rGO was more stable as compared to NiCo2O4. Electrochemical studies reveal that the NiCo2O4/rGO exhibits high specific capacitance of 1960 F/g in comparison with NiCo2O4 of 870 F/g. NiCo2O4/rGO has energy density of 300 W h/kg at low power density and ultra high power density of 18.74 kW/kg at low energy density. Incorporation of reduced graphene oxide increases the specific capacitance, energy density and power density of the electrode material. The SEM micrographs reveal the formation of cabbage-like structure of the nanocomposite. These results of NiCo2O4/rGO have drawn increasing attention as the latter is a promising electrode material for high performance supercapacitors.