MODIFIED NATURAL GRAPHITE PARTICLES

摘要

A modified natural graphite material that provides a negative electrode plate with excellent adhesion between a negative electrode composite material and a current collector has a circularity of 0.92-1.0, and the incidence angle dependency S60/0 of the peak intensity ratio obtained from the C-K end X-ray absorption spectrum of a powder measured using the emitted light as an excitation light source is 0.5-0.7. Preferably at least one of the following conditions is satisfied: absolute specific gravity is 2.25 g/cm3 or higher, tap density is 1.0-1.4 g/cm3, and the linseed oil absorption is 20-50 cm3/100 g. A carbonaceous material may be adhered to at least a portion of the surface thereof.