| 摘要 |
PROBLEM TO BE SOLVED: To provide a negative electrode active material for lithium ion secondary battery having a high capacity per unit volume (weight), provided with practical characteristics capable of dealing even with the automotive applications for HEV, PHEV, and the like, of the discharge capacity, initial efficiency, input characteristics, capacity retention rate, and the like, and to provide a lithium ion secondary battery negative electrode using the same and a lithium ion secondary battery.SOLUTION: A negative electrode active material for lithium ion secondary battery is formed of a carbon material having a true specific gravity of 2.00-2.16 g/cm, where the D, D, Dand D-Dare in the range of 2-5 μm, 8-12 μm, 16-26 μm and 5-10 μm, respectively, in the particle size distribution of particles in volume reference, the tap density is 0.4 g/cc or more, and the BET specific surface area by nitrogen gas adsorption distribution method is 5.1-9.0 m/g. A lithium ion secondary battery negative electrode using the same, and a lithium ion secondary battery are also provided. |
