Electrochemical properties of porous nickel-based compounds prepared by low temperature molten salt method for aqueous supercapacitors
WEI Li
WANG Zhikai
JIA Xi
WEI Wutao
Abstract：An amorphous nickel-based nanomaterial with porous honeycomb structure was synthe-sized by low temperature molten salt method.The composition and morphology of the materials were characterized by X-ray diffraction,X-ray photoelectron spectroscopy and scanning electron microsco-py.The results show that the synthesized material is amorphous and mainly composed of nickel-based sulfide and nickel-based hydroxide.The material is a nanomaterial with a porous honeycomb struc-ture.The electrochemical performance of the material was tested in a three-electrode system,and the specific capacity of 346 F/g was achieved at a current density of 0.5 A/g.An aqueous supercapacitor was assembled with the prepared nanomaterial as the positive electrode,activated carbon as the nega-tive electrode,and 2 mol/L KOH solution as the electrolyte.The electrochemical tests were carried out on the supercapacitor,which showed that the supercapacitor possessed excellent multiplicity per-formance and cycling stability,and also demonstrated high power and energy densities.It still pos-sessed 78.5％capacity retention and 93.3％coulombic efficiency after 15 000 cycles at 10 A/g.The prepared porous nickel-based nanomaterials show good performance and potential applications.
Keywords：low-temperature molten saltnickel-based compoundmagnification performancelong cycle
Publication Date：2025-04-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 34-40 )