Study on preparation of NiCo2O4/RGO composite material and its electrochemical performance

Abstract

Abstract: The NiCo₂O₄/RGO composite material was prepared by a two-step hydrothermal method and its electrochemical performance was studied. The research results showed that when the current density was 1 A/g, the specific capacitance of NiCo₂O₄/RGO composite material was as high as2 332.40 F/g, which was about three times that of NiCo₂O₄ material. When the current density was increased to 10 A/g, its specific capacitance could be maintained 1 127.22 F/g, showing excellent rate performance. Due to the special porous and fluffy structure of the composite material, the specific surface area of the material is effectively increased. The specific surface area of NiCo₂O₄ is 56.488 0 cm²/g, while the specific surface area of NiCo₂O₄/RGO composite material is as high as 188.604 2 cm²/g, which can provide more reactive sites, at the same time, RGO can effectively improve the conductivity of the material, thereby, the electrochemical performance is greatly improve.

Key words: supercapacitor, NiCo₂O₄/RGO, electrochemistry, composite material

CLC Number:

O469

WANG Qing, GENG Wen-bo, DAI Jian-feng , LI Wei-xue, GAO Shan-shan. Study on preparation of NiCo₂O₄/RGO composite material and its electrochemical performance[J]. Journal of Lanzhou University of Technology, 2021, 47(5): 162-166.

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Study on preparation of NiCo₂O₄/RGO composite material and its electrochemical performance

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