实验以石墨烯(Graphene, GE)为晶种,精制煤沥青为原料,通过程序控温,对如何制备高含量的各向异性中间相条件进行了优化,并将其用于制备半焦和针状焦研究。中间相和半焦的组织结构采用偏光显微镜进行了观察和分析,针状焦用X射线衍射仪(XRD)和扫描电子显微镜(SEM)进行了观察,并通过电化学工作站对半焦进行了电化学性质分析,用循环伏安法对石墨微晶结构的有序性进行了分析。结果表明：石墨烯的加入,明显促进了中间相小球的形成,显著提高了所制针状焦结构的有序性和电子的传输能力。其中,当石墨烯加入量为原料的0.2wt%时,得到的中间相小球数量最多且大小均匀,半焦结构的纤维流域状结构成为其主要的显微组织。在相同的情况下,同未加石墨烯相比较,石墨烯的存在使制备的针状焦石墨化度提高了200%；电荷迁移电阻减少65.3%。
Anisotropic mesophase pitch of the highest content were produced by using graphene (GE) as structural di-recting 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 diffrac-tion analyzer and scanning electronic microscope, respectively. Its electrochemical properties were observed by electro-chemical workstation and the microcrystallite structure was analyzed by cyclic voltammetry. The results showed that ad-dition 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.
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