PARTICULATE ARTIFICIAL GRAPHITE NEGATIVE ELECTRODE MATERIAL, METHOD OF MANUFACTURING THE SAME, NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY USING THE NEGATIVE ELECTRODE MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode material capable of increasing the capacity of a lithium secondary battery and reducing the expansion of the electrode in charging.

SOLUTION: In the negative electrode material made of particulate artificial graphite, (a) tap density is made to be ≥1.15 g/cm3, (b) the plane interval d002of (002) plane by X-ray diffraction is made to be ≤0.3360 nm, (c) the orientation ratio of a active material of the electrode, formed by using the negative electrode material as the active material and made to have 1.63±0.05 g/cm3electrode density, is made to be ≥0.04 and ≤0.20 and (d) the discharge capacity of the lithium secondary battery formed by using the negative electrode material is made to be ≥345 mAh/g.

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