Nitrogen doped secondary particle graphite anode for high capacity and high rate Li ion battery

The high specific capacity with high rate characteristic graphite anode was synthesized by nitrogen doping and secondary particle bonding technologies. The reversible capacity of the obtained graphite was 359.8mAh/g. The full pouch cells with the minimal energy density of 230Wh/Kg (650Wh/L) were assembled to evaluate the electrical performance. The charging capacity can research 51% within 10 minutes, and 100% within 30 minutes, demonstrating an excellent fast charging characteristics. The fast charge cycle test with 3C-rate charge and 1C-rate discharge was conducted at room temperature. It shows that even after 1000 cycles, there is still 88% of the initial capacity, and the maximum swelling rate is 10.1%, which can meet the demand of most electron devices and electric vehicles.