| 摘要 |
PROBLEM TO BE SOLVED: To provide a process for treating mesophase-containing pitch which inhibits fusing and expansion of particles at carbonization or graphitization and yields a graphite material having a high degree of graphitization, preparation processes for a carbon material and a graphite material and a lithium ion secondary battery negative electrode material which yields a lithium ion secondary battery having a large charge-discharge capacity. SOLUTION: In a process for treating mesophase-containing pitch, using a heterocyclic compound and/or polycyclic aromatic hydrocarbon, light components are extracted and removed from mesophase-containing pitch obtained by polymerizing a fused polycyclic aromatic hydrocarbon in the presence of a catalyst. In a preparation process of a carbon material, the mesophase- containing pitch obtained through this treatment process is carbonized. In a preparation process of a graphite material, the carbon material obtained through this process for preparing a carbon material is graphitized. A lithium ion secondary battery negative electrode material is the graphite material obtained through this process for preparing a graphite material. |
