Preparation and Electrochemical Performance of Sheet Structure Ni-MOF
Ni-MOF was synthesisied with NiCl2·6H2O and PTA through a facile hydrothermal meth-od.The surface morphology and internal crystal structure of Ni-MOF was characterized by Fourier trans-form infrared spectroscopy(FT-IR),X-ray diffraction,thermo gravimetric-differential thermal analy-sis(TG-DTA)and scanning electron microscopy(SEM).The electrochemical property was tested in the three-electrode system.The surface morphology analysis test results show that the Ni MOF material pre-pared by hydrothermal method exhibits a nano layered stacking morphology,and its unique layered struc-ture has a positive impact on the electrochemical performance of the material,not only exposing more ac-tive sites,but also promoting the diffusion of electrolyte ions in the electrochemical reaction process.The electrochemical test shows that the specific capacitance of Ni-MOF in 3 mol/L KOH electrolyte reaches 905 F/g at the current density of 0.25 A/g.At 10 A/g,the specific capacitance is still maintained at 580 F/g.The results of kinetic analysis show that the REDOX process of Ni-MOF is a typical charge storage mechanism controlled by diffusion process.These good properties indicate that the metal-organic frame-work as electrode materials has a good application prospect in the field of energy storage.
metal organic frameworksnano-sheetsupercapacitorelectrochemical
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