| 摘要 |
The invention discloses an electrical core system of lithium ion battery, which comprises a positive electrode material system, a negative electrode material system and an electrolyte system, wherein the positive electrode material system comprises LiCoO2 with D50 of 10 to 15 mum and LiNixCoyMn(1-x-y)O2 with D50 of 5 to 8 mum, x is not larger than 0.9 and not less than 0.6 and y is not larger than 0.05 and not less than 0.3; the negative electrode material system is made from artificial graphite; the electrolyte system includes DMC, EMC, DEC and EC with a ratio of (0.5-1):(50-80):(0.5-1):(30-50). The electrical core of the lithium ion battery of the invention can enhance the cycle performance of the lithium ion battery, achieve a long cycle life of the lithium ion battery and save the energy resources. |
