LITHIUM ION BATTERY AND NEGATIVE ELECTRODE MATERIAL THEREOF

The present invention provides a lithium ion battery and a negative electrode material thereof. The negative electrode material includes a graphite and an amorphous carbon, wherein the graphite has a graphitization degree of 90˜96% and an average particle diameter D50 of 2˜25 μm, and the amorphous carbon has a graphitization degree of 65˜80% and an average particle diameter D50 of 2˜25 μm. Compared with the prior art, by mixing graphite having a small particle diameter with amorphous carbon, the negative electrode material of the present invention has excellent dynamic performance, cycle performance and storage performance. The present invention also provides a lithium ion battery.