Presently, carbon-based anodes for energy storage, such as graphite for lithium-ion batteries (LlBs) and hard carbon for sodium-ion batteries (SlBs), have low capacity and poor rate properties. However, the capacity and rate capability of these anodes can be improved via morphological control, doping and using nanostructures. In this report, a series of self-assembled N-doped porous carbon nanocomposites (NPCNs) were prepared via pyrolysis of metal-organic frameworks (MOFs)-ZIF-8/carbon nanocomposites grown on various carbon frameworks (1D CNT and/or 2D rGO). It was found that the [email protected] electrode significantly exhibits superior performance for lithium/sodium storage among the other NPCNs. [email protected] electrode delivers high initial reversible capacities (986 mAh g⁻¹ at 0.1 A g⁻¹ in LIBs; 315 mAh g⁻¹ at 0.05 A g⁻¹ in SIBs), excellent rate properties (443 mAh g⁻¹ at 5 A g⁻¹ in LIBs; 174 mAh g⁻¹ at 1 A g⁻¹ in SIBs) and durable cycle life (99% capacity retention after 2000 cycles at 5 A g⁻¹ in LIBs, 80% capacity retention after 300 cycle at 1 A g⁻¹ in SIBs). This ‘carbon-on-carbon’ approach described herein can be applied to make other interesting structures for high performance battery materials.

当前，用于能量存储的碳基阳极，例如用于锂离子电池（LlBs）的石墨和用于钠离子电池（SlBs）的硬碳，具有低容量和差的速率特性。但是，可以通过形态控制，掺杂和使用纳米结构来提高这些阳极的容量和倍率能力。在本报告中，通过热解在各种碳骨架（1D CNT和/或2D碳纳米管）上生长的金属有机骨架（MOF）-ZIF-8 /碳纳米复合物，制备了一系列自组装的N掺杂多孔碳纳米复合物（NPCN）。 rGO）。发现[受电子邮件保护的]电极在其他NPCN中显着表现出优异的锂/钠存储性能。[受电子邮件保护]电极具有很高的初始可逆容量（986 mAh g ^-1在LIB中为0.1 A g ^-1时; 在SIBs中为0.05 A g ^-1时为315 mAh g ^-1），优异的速率特性（在LIB中为5 A g ^-1时为443 mAh g ^-1 ;在SIB中1 A g ^-1时为174 mAh g ^-1）寿命（LIB中5 A g ^-1下2000次循环后99％的容量保留，SIB中1 A g ^-1下300次循环后80％的容量保留）。本文描述的这种“碳对碳”方法可以应用于制造高性能电池材料的其他有趣结构。