Preparation and electrochemical properties of NiMn-MOF with 3D pore network electrode materials
Addressing the issue of low energy density and complex preparation process associated with supercapacitor electrode materials,this study capitalizes on the high specific surface area and porous structure of MOF materials.Bimetallic NiMn-MOF nanosheets with a three-dimensional pore network structure were prepared through a simple and controllable one-step hydrothermal method.The close atomic radius of Ni and Mn proved beneficial for synthesizing bimetallic NiMn-MOF,exposing additional active sites.The optimization of process parameters resulted in bimetallic NiMn-MOF electrode materials with high specific volumes.The morphology and crystal structure of the electrode materials were characterized in detail via scanning electron microscopy,energy-dispersive spectroscopy,and X-ray diffraction.The electrochemical properties were also analyzed using cyclic voltammetry,galvanostatic charge/discharge,and electrochemical impedance spectroscopy.The results showed an impressive specific capacitance of 1023.5 F/g at 0.5 A/g in a 6 mol/L KOH electrolyte.Additionally,an assembled asymmetric supercapacitor delivered a capacitance of 94.37 F/g at 0.5 A/g,successfully powered a red LED.This outcome underscores the excellent electrochemical performance of NiMn-MOF,offering a new approach to preparing electrode materials for supercapacitors.
国家科技期刊平台
NSTL
万方数据
维普
