| abstract |
(57) [Abstract] [Problem] When used as a negative electrode material of a lithium secondary battery, the charge / discharge capacity of the battery exceeds the theoretical capacity of 372 Ah / kg, A modified carbon material which does not cause significant deterioration even when left in air, a negative electrode material and a negative electrode material for a lithium secondary battery comprising the carbon material, and a lithium secondary material using the negative electrode material The main purpose is to provide a battery. A negative electrode carbon material for a lithium secondary battery in which the surface of a composite of graphite and hard carbon is coated with a fired carbon material. |