Raw material carbon composition of the negative electrode carbon material of a lithium ion secondary battery and manufacturing method thereof

It provides a useful lithium ion secondary battery negative electrode material for a raw material carbon composition to achieve good high-speed charge-discharge characteristics. The incidence of generated gas composed of hydrogen gas and C1~C4 gas generated by the heavy oil to coking process (wt%), the ratio of the production rate of the raw material carbon composition (mass%), the incidence / average stripes obtained by delayed coking of a condition is a creation ratio = 0.3 to 0.8 are lumps an average length of the base of the fringes W, the average height H, the vertical direction If the length is L, H / W is 0.15 to 0.40, and the raw material of the negative electrode carbon material for a lithium ion secondary battery, characterized by L / W is 5.0 or more carbon composition.