首页|Preparation of rGO/Ni2ZnS4 and high-performance asymmetric supercapacitors with GO/ZIF-8 template
Preparation of rGO/Ni2ZnS4 and high-performance asymmetric supercapacitors with GO/ZIF-8 template
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NSTL
Elsevier
? 2022 Elsevier B.V.Graphene oxide (GO) was used as a substrate, and ZIF-8 was grown in situ on the GO surface and used as a template. The rGO/Ni2ZnS4 composite was prepared by nickel nitrate etching, carbonization, and hydrothermal vulcanization. X-ray diffraction (XRD), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS) were used to characterize the structure and morphology of the composite material. Then the rGO/Ni2ZnS4 composite material was made into a cathode material, and its electrochemical performance was tested. The test results showed that the specific capacitance value of the rGO/Ni2ZnS4-1.5h electrode material was as high as 1150 F·g?1 at a current density of 1 A·g?1, when the current density reaches 10 A·g?1, the rate performance is 63.3%. After 2000 cycles at a current density of 10 A·g?1, the capacitance retention rate is 59.7%. In addition, an asymmetric capacitor composed of AC//rGO/Ni2ZnS4-1.5h has an energy density of 31.06 Wh·kg?1, when the power density is 750.44 W·kg?1. When the high power density is 7489.18 W·kg?1, the energy density remains at 12.69 Wh·kg?1.
NSTL
Elsevier
