Graphite intercalation compounds (GIC) was achieved by electrochemical intercalation and exfoliation of graphite rod in Na2SO4 aqueous solution,and then with the assistance of ultrasonication,graphene dispersion in NMP was prepared using GIC as raw material.The results showed that GIC prepared by the electrochemical intercalation and exfoliation of graphite rod had larger layer space than graphite,which made GIC easy to be exfoliated into graphene.The concentration of graphene dispersion was 11.47mg/mL and the yield was up to 37%.The specific capacitance of supercapacitor was 162F/g.
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