Preparation of high-performance anthracite-based graphite anode materials and their lithium storage properties

In this study, cost-effective anthracite and industrial silicon powder were used as precursor and catalyst, respectively, to prepare graphite with various structure, during which the catalytic mechanism was analyzed. The results demonstrate that the asobtained sample with 5% silicon catalyst (G-2800-5%) exhibits the best overall lithium storage performance. In detail, G-2800-5% display the best graphite structure with graphitization degree of 91.5%. As anode materials, a high reversible capacity of 369.0 mAh g-1 can be achieved at 0.1 A g-1. Meanwhile, the reversible capacity of 209.0 mAh g-1 can be obtained at the current density of 1 A g-1. It also delivers good cyclic stability with a 92.2% retention after 200 cycles at 0.2 A g-1. The highly developed graphite structure, whichis favorable to the formation of stable SEI and reduced lithium ion loss should be responsible for the superior electrochemical performance.