Morphology Control and Electrochemical Properties of Carbon Microspheres from Urea-formaldehyde Resin Precursors
In order to investigate the effects of raw materials ratio on the morphology of urea formaldehyde resin and the electrochemical performance of carbon microspheres,three kinds of urea-formaldehyde resin microspheres with different micro/nano structures were prepared by changing the amount of substance ratio of urea,formalde-hyde and formic acid,after that,the corresponding carbon microspheres were obtained by pyrolysis at 800 ℃ un-der nitrogen protection.The flower-like carbon nanospheres(NUFC-3)prepared by the above urea-formaldehyde resin precursor were used as electrode materials,and the NUFC-3 showed good electrochemical performance in the three-electrode system.The results show that the specific capacitance(Cs)is 189 F/g at a current density of 1 A/g;the Cs is 145 F/g at a current density of 20 A/g,and the retention rate of Cs is 76.7％.The carbon micro-spheres prepared by the precursor of urea formaldehyde resin have many advantages like simple preparation meth-od,low cost and good electrochemical performance,which are expected to be applied in the field of electrochemi-cal energy storage.
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