Hydrothermal Synthesis of NiCo-layered Double Hydroxide Nanosheets Decorated on Biomass Carbon Skeleton for High Performance Supercapacitor

Abstract

A facile hydrothermal strategy is adopted to synthesize the composite of NiCo-layered double hydroxide(NiCo-LDH) with biomass carbon as substrate for supercapacitor electrodes. The prepared NiCo@BC was characterized by means of X-ray diffraction(XRD), scanning electronic microscopy(SEM), Fourier transform infrared spectroscopy(FTIR) and Raman spectroscopy, and electrochemical tests. The SEM images demonstrated that numerous NiCo-LDH nanosheets directly grew on the surface of biomass carbon uniformly. Electrochemical tests indicated that the NiCo@BC electrode exhibited good capacitive behavior with a specific capacitance of 606.4 F/g at the current density of 0.5 A/g. In addition, the composite electrode showed excellent cyclic stability of 87.1% even after 1000 cycles. These results manifest that NiCo@BC nanocomposite is a promising candidate for the electrode material for future supercapacitor practical applications.

Keywords

NiCo-layered double hydroxide / Biomass carbon / Hydrothermal / Supercapacitor

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