Negative electrode material for nonaqueous secondary battery

摘要

To provide a carbon material capable of suppressing excessive reactivity with an electrolytic solution and excellent in a rapid charge/discharge characteristics. A carbon material for lithium ion secondary batteries, which satisfies: (i) a tap density≧0.75 g/cm3; (ii) a Raman R value≧0.23 and a half width of D bandΔνD<45 cm−1, in which the D band appears in the vicinity of 1,358 cm−1 of the Raman spectrum; and (iii) 4 m2/g≰BET specific surface area (SA)≰11 m2/g.