Carbonaceous materials are practical anodes for lithium-ion batteries. Commercial graphite anode has a limited theoretical capacity of 372 mAh g⁻¹. Amorphous carbon anode could break the capacity limitation of the graphite anode, while nitrogen doping plays a critical role in effectively enhancing the reversible capacities and rate capability of carbonaceous anodes. Herein, we propose a new strategy for synthesizing nitrogen-doped carbon materials from graphitic carbon nitride. Zinc-assisted thermal treatment of graphitic carbon nitride enables the carbonization of graphitic carbon nitride and successful preparation of highly nitrogen-doped carbon. The obtained nitrogen-doped carbon material is doped with a high-level nitrogen of 21.6 at. % which enables high reversible capacity and rate capability. This work puts forward a new synthesis protocol of nitrogen-doped carbon materials for promising anodes of lithium-ion batteries.

碳质材料是锂离子电池的实用阳极。商业石墨阳极的理论容量有限，为372 mAh g ^-1。非晶碳阳极可以打破石墨阳极的容量限制，而氮掺杂在有效增强碳质阳极的可逆容量和倍率容量方面起着关键作用。在此，我们提出了一种从石墨碳氮化物合成氮掺杂碳材料的新策略。石墨氮化碳的锌辅助热处理能够使石墨氮化碳碳化并成功制备高氮掺杂的碳。将获得的氮掺杂碳材料掺杂21.6at。％的高水平氮。％具有很高的可逆容量和速率能力。这项工作提出了一种新的氮掺杂碳材料合成方案，可用于锂离子电池的正极。