Carbon materials are among the most important materials used for anodes in rechargeable batteries due to their extensive resources and good cycling stability. However, the electrochemical performance of carbon-based anodes is closely related with their electronic states and morphologies/microstructures. Herein, we present a simple approach to synthesize a nitrogen-doped 3D nanocarbon (N-Carbon) with nanopore defects as high-capacity and stable anodes for sodium/lithium-ion batteries. This carbon material well inherits the unique nanosheet-like morphology of the template, which is composed of twisted-interconnected cuboidal hollow nanocages with a large number of nanopores across the shells. N-Carbon with integration of N heteroatom and 3D porous structure exhibits high reversible capacities of sodium-ion batteries, up to 401.9 and 311.7 mAh g⁻¹ at 0.1 and 0.5 A g⁻¹ after 100 cycles, respectively. This unique carbon material simultaneously exhibits excellent rate capability and cycling stability, with reversible capacities of 199.7 and 97.9 mAh g⁻¹ at large current densities of 1 and 5 A g⁻¹ even after 10,000 cycles, respectively. Moreover, N-Carbon also exhibits high capacity of 709 mAh g⁻¹ for lithium-ion batteries after 2500 cycles at 10 A g⁻¹. The excellent reversibility, rate capability, and cycling stability are attributed to this unique N-Carbon integrating into rich nitrogen-doped induced ion-storage sites and its relative ordered 3D pore structure.

碳材料因其广泛的资源和良好的循环稳定性而成为可再充电电池阳极中最重要的材料。然而，碳基阳极的电化学性能与其电子状态和形态/微观结构密切相关。在这里，我们提出了一种简单的方法来合成具有纳米孔缺陷的氮掺杂3D纳米碳（N-碳），作为钠/锂离子电池的高容量和稳定阳极。这种碳材料很好地继承了模板独特的纳米片状形态，该形态由扭曲互连的长方体空心纳米笼组成，在整个壳体中具有大量纳米孔。结合了N杂原子和3D多孔结构的N-碳展现出高可逆的钠离子电池容量，高达401.9和311.7 mAh g^-1在0.1和0.5 A克^-1分别为100个循环，之后。这种独特的碳材料同时具有出色的速率能力和循环稳定性，即使在10,000次循环后，在1和5 A g ^-1的大电流密度下，其可逆容量也分别为199.7和97.9 mAh g ^-1。此外，N-碳在10 A g ^-1下经过2500次循环后，对锂离子电池也表现出709 mAh g ^-1的高容量。优异的可逆性，速率能力和循环稳定性归因于这种独特的N-碳整合到富氮掺杂的诱导离子存储位点中，以及其相对有序的3D孔结构。