Preparation of Laser-Induced Graphene Intercalation Composites and Control of Electrical Conductivity
Due to the low carrier density of multi-layer graphene,its conductivity is limited.In order to improve the conductivity of graphene,this paper prepared first and second order graphene intercalation compounds based on laser induced graphene(LIG)using a two temperature zone gas phase intercalation method.The morphology and structure of the intercalation compounds were characterized by XRD,scanning electron microscopy,Raman spectroscopy,and other methods.The conductivity was tested using a standard four probe method.The results indicate that the compound retains the three-dimensional porous structure of LiG well,providing a fast channel for electron conduction;Its conductivity has increased from 634 S/m of pure LIG to 943 S/m of first-order intercalation and 1306 S/m of second-order intercalation,and after intercalation,it can still transfer to other substrates relatively intact without structural damage.The intercalation process is formed by the gradual diffusion of the intercalating agent from the center to the edge,and the intense movement of the intercalating agent molecules during the intercalation process causes damage to the LiG surface.
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