Abstract: NiO@CeO2 nanoflower electrode material for supercapacitor was synthesized by hydrothermal method,and the structure and morphology were researched by X-ray diffraction (XRD) and scanning electron microscopy (SEM),respectively.The electrochemical properties were investigated by cyclic voltammetry (CV),galvanostatic charge-discharge and electrochemical impedance spectroscopy (EIS),respectively.XRD showed that the structure of NiO@CeO2 was similar with NiO.SEM pictures indicated that the morphology of NiO@CeO2 was accumulated by nanosheet.CV test indicated that NiO@CeO2 had a couple redox peaks.Charge-discharge measurement revealed that NiO@CeO2 had wonderful specific capacity and cycling stability.EIS exhibited that the resistance value after 5000 cycles was increased,and it may be the reason of reduction of capacity.
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