| 摘要 |
Provided are Composite graphite particles comprising core material comprising graphite obtained by heat treating petroleum based coke with a grindability index of 35 to 60 at a temperature of not less than 2500° C. and not more than 3500° C. and carbonaceous layer present on the surface of the core material, wherein the composite graphite particles have an intensity ratio ID/IG of 0.1 or more in intensity (ID) of peak in the range between 1300 and 1400 cm-1 and intensity (IG) of peak in the range between 1500 and 1620 cm-1 as measured by Raman spectroscopy spectrum, the composite graphite particles have a 50% particle diameter (D50) of not less than 3 mum and not more than 30 mum in accumulated particle size distribution by volume as measured by the laser diffraction method, and the composite graphite particles have a ratio I110/I004 of 0.2 or more in an intensity of 110 diffraction peak (I110) and an intensity of 004 diffraction peak (I004) as measured by the X ray wide angle diffraction method when the composite graphite particles and a binder was molded with pressure to adjust the density of 1.35 to 1.45 g/cm3. |
