碳质中间相形成机理研究

碳质中间相是制备高性能炭材料制品的优质前驱体，其产品已在高性能复合材料、超高功率石墨电极和二次锂离子电池用负极材料等方面得到了成功应用。碳质中间相产品的结构复杂、形态各异，造成了生产这些产品涉及的原料和处理过程的多样化。为了分析和预测一定条件下获得的碳质中间相产品的性能，进而确定其具体的用途，需要弄清碳质中间相的形成机理。通过系统地探讨碳质中间相的形成过程，对以往文献中的解释给予了归纳和分析。分析认为传统解释中存在许多不合理的地方，不能对一些现象给予合理的解释；“微域构筑”理论在传统解释的基础上有了很大进步，但由于该理论中引入了实际上并不存在的片层微晶单元而使其存在缺陷；“颗粒基本单元构筑”理论摒弃了以上两种理论中的不合理成分，能够对碳质中间相的形成过程进行很好的解释。此外，对“颗粒基本单元构筑”理论的一些应用也进行了讨论。

The formation mechanism of carbonaceous mesophase

Carbonaceous mesophase is an excellent precursor for the production of high-performance carbon materials which have been successfully applied in high-performance composites, ultra-high power graphite electrodes and anodes of rechargeable lithium ion batteries. The complicated structures and various forms of carbonaceous mesophase make the raw materials and production process involved more complicated. It is important to have a good understanding of the mesophase formation mechanism in order to predict the performance of mesophase based carbon materials prepared under different conditions and to determine further their applications. A review of the formation process and mechanism of carbonaceous mesophase is given based on explanations in previous papers and a new Building from Granular Basic Units (BGBU) theory is proposed. It is found that there are many unreasonable explanations in traditional theory that cannot clarify some experimental facts. Microdomain building theory made great progress in explaining the formation of carbonaceous mesophase, but the introduction of the non-existent stacking units of molecules is a defect of the theory. BGBU theory was brought forward based on the former theories and can explain the formation process of carbonaceous mesophase very well. In addition, some applications of BGBU theory are discussed.