NEGATIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR PRODUCING SAME, NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY USING SAME AND LITHIUM SECONDARY BATTERY

摘要

A negative-electrode material is provided that can be produced at a low cost and yields a lithium secondary battery with an excellent balance of various battery characteristics even when used in high electrode densities.
It has a graphite powder with a tap density of 0.80g/cm 3 or higher and 1.35g/cm 3 or lower, an amount of surface functional groups, O/C value, of 0 or larger and 0.01 or smaller, a BET specific surface area of 2.5m 2 /g or larger and 7.0m 2 /g or smaller, a Raman R value of 0.02 or larger and 0.05 or smaller.