NEGATIVE ELECTRODE ACTIVE MATERIAL, AND NEGATIVE ELECTRODE AND LITHIUM SECONDARY BATTERY COMPRISING SAME

A negative electrode active material including artificial graphite secondary particles comprising artificial graphite primary particles having an average particle diameter (D50) of 10 nm to 9 μm, said artificial graphite secondary particles being formed by granulating said artificial graphite primary particles, wherein a value (V) obtained by dividing a minimum particle diameter (D) of the secondary particles by the average particle diameter (D) of the initial particles is 0.50 to 0.8, and a value (V) obtained by dividing the minimum particle diameter (D) of the secondary particles by an average particle diameter (D) of the secondary particles is 0.23 to 0.4.