NEGATIVE ELECTRODE MATERIAL FOR NONAQUEOUS SECONDARY BATTERY

摘要

Disclosed is a carbon material that can suppress an excessive reaction with an electrolysis solution and has excellent rapid discharge and charge properties. A carbon material for a lithium ion secondary battery satisfies (i) tap density = 0.75 g/cm3, (ii) Raman R value = 0.23 and half-value width of D band which appears around 1358 cm-1 in a Raman spectrum, ??D -1, and (iii) 4 m2/g = BET specific surface area (SA) = 11 m2/g.