| 摘要 |
PURPOSE: Provided is an anode active material for a lithium ion secondary battery, which provides a battery with excellent cycle life characteristics and high capacity. CONSTITUTION: The anode active material for a lithium ion secondary battery comprises low-capacity artificial graphite having a specific surface area of less than 1.0 m2/g and a tap density of 1.0 g/cm¬3 or more, and high-capacity artificial graphite having a specific surface area of 1.0 m2/g or more and a tap density of less than 1.0 g/cm¬3. Particularly, the low-capacity artificial graphite and high-capacity artificial graphite are used in a mixing ratio of between 1:9 and 5:5. |
