科研之友
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摘要
Anisotropic mesophase pitch of the highest content were produced by using graphene (GE) as structural directing agent, and refined coal tar pitch as the raw material, and which was applied to prepare semi-coke and needle coke thereafter with the utilization of temperature controlling program. The textures of mesophase pitch and semi-coke were investigated by polarizing microscope, and the structure and morphology of needle coke were analyzed by X-ray diffraction analyzer and scanning electronic microscope, respectively. Its electrochemical properties were observed by electrochemical workstation and the microcrystallite structure was analyzed by cyclic voltammetry. The results showed that addition of graphene obviously accelerated the formation of meso-sphere and enhanced structural orientation of needle coke and the electric transporting capability. Especially, nearly the same size and the largest number of meso-sphere in the pitch were obtained when the mass percentage of graphene in feedstock reached 0.2wt%; and lots of fibrous texture in semi-coke can be observed. At the same conditions, the existence of graphene made the degree of graphitization of needle coke increase by 200% and the charge transfer resistance decrease by 65.3%, as comparing with that without graphene.
- 出版日期2014-9-20
- 单位太原理工大学
