Abstract With high capacities, as well as controllable morphologies and compositions, doped carbons represent attractive options for metal-ion battery electrode materials. In this work, we demonstrated a facile one-pot, one-step production of nitrogen-doped porous carbon (NPC) from an abundant and inexpensive urea precursor. The unique porous structure composed of an abundance of graphene nanosheets with high nitrogen doping level for the obtained NPC materials resulted in very promising electrochemical performances when used in lithium-ion batteries (LIBs). A high reversible lithium storage capacity of 1781 mAh/g was obtained after 500th cycle, with an enhanced cycling stability and rate capability. The method presented in this work may provide a simple, clean, economical and scalable strategy for production of NPC as a feasible and promising anode material for energy storage applications.

中文翻译：

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尿素镁热还原直接制备掺氮多孔碳

摘要 由于具有高容量以及可控的形态和成分，掺杂碳代表了金属离子电池电极材料的有吸引力的选择。在这项工作中，我们展示了一种从丰富且廉价的尿素前体中简便地一步法生产掺氮多孔碳 (NPC) 的方法。所获得的 NPC 材料由大量具有高氮掺杂水平的石墨烯纳米片组成的独特多孔结构在用于锂离子电池 (LIB) 时产生了非常有前途的电化学性能。在第 500 次循环后获得了 1781 mAh/g 的高可逆锂存储容量，具有增强的循环稳定性和倍率性能。这项工作中提出的方法可以提供一个简单、干净、