Nickel-cobalt layered bimetal hydroxide(NiCo-LDH)electrodes were synthesized on foamed nickel by one-step hydrothermal method.The morphology of the electrodes was analyzed by scanning electron microscopy,and the phase of the electrodes was analyzed by X-ray diffraction.The electrochemical properties of the NiCo-LDH nanomaterials were tested at different scanning rates and current densities.The results showed that with the increase of urea content,the morphology of NiCo-LDH changed from hexagonal lamellae to grassy tufts,and finally to needle-like lamellae.The redox peak was clearly seen in the CV curve at a scanning rate of 10 mV.s-1.The symmetrical charging and discharging platforms appeared in the charge-discharging curves between 0.30 V and 0.35 V,indicating that both the charging and discharging capacity and the charging and discharging time were excellent,and the composite material had good capacitive performance.
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