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/cm 3 ; (ii) a Raman R value ‰¥ 0.23 and a half width of D band ”v D < 45 cm -1 , in which the D band appears in the vicinity of 1,358 cm -1 of the Raman spectrum; and (iii) 4 m 2 /g ‰¤ BET specific surface area (SA) ‰¤ 11 m 2 /g.