公开(公告)号：US20140248493A1

公开(公告)日：2014-09-04

申请号：US14349515

申请日：2012-10-02

Applicant: TODA KOGYO CORP

Inventor： Seiji Okazaki ,  Wataru Oda ,  Tomoaki Urai ,  Akio Sakamoto

IPC: H01M4/587

CPC classification number: H01M4/587 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/182 ,  Y10T428/2982

Abstract: The present invention provides a spherical carbon material in the form of isotropic particles which undergoes a considerably less change in shape even after subjected to carbonization or graphitization, and has a good crystal growth property. The present invention relates to a raw coke spherical carbon material in which an average of a plane-direction sphericity and an elevation-direction sphericity of particles of the spherical carbon material as measured in plane and elevation directions of particles of the spherical carbon material, respectively, by observation using a scanning electron microscope is not less than 60%, and a shape retention rate of the spherical carbon material after being heated at 1200° C. for 5 hr and then at 2800° C. for 3 hr is not less than 70%; a process for producing the above raw coke spherical carbon material, comprising the step of applying a compression shear stress to raw coke particles comprising particles having a particle diameter that is not more than 1/3 of an average particle diameter (D50) thereof in an amount of not less than 5% to subject the raw coke particles to dry granulation sphericalization treatment; a carbonaceous spherical carbon material obtained by carbonizing the above raw coke spherical carbon material and a process for producing the carbonaceous spherical carbon material; and a graphite spherical carbon material obtained by graphitizing the above raw coke spherical carbon material and a process for producing the graphite spherical carbon material.

Abstract translation: 本发明提供一种各向同性粒子形状的球形碳材料，其即使经过碳化或石墨化也经历了相当小的形状变化，并且具有良好的晶体生长性能。 本发明涉及一种原焦炭球形碳材料，其中分别在球形碳材料颗粒的平面和高度方向上测量球形碳材料颗粒的平面方向球形度和高度方向球形度 通过使用扫描电子显微镜的观察不低于60％，并且在1200℃下加热5小时，然后在2800℃下3小时后的球形碳材料的形状保持率不小于 70％; 一种生产上述原料焦炭球形碳材料的方法，包括将压缩剪切应力施加到原料焦炭颗粒的步骤中，所述原料焦炭颗粒包含粒径不大于其平均粒径（D50）的1/3的颗粒， 数量不少于5％，使原焦颗粒干燥造粒球化; 通过碳化上述原料焦炭球形碳材料获得的碳质球形碳材料和碳质球形碳材料的制造方法; 以及通过石墨化上述原料焦炭球形碳材料得到的石墨球形碳材料和石墨球形碳材料的制造方法。