Sodium-ion batteries (SIBs) are being increasingly studied due to their cost-effectiveness, high energy density and abundant resources. However, because of scanty interlayer spacing, commercial graphite-based materials that are currently used in lithium-ion batteries (LIBs) are not compatible for SIB anodes. Herein, we design a very convenient template strategy to synthesize spongy-like N, S-codoped ultrathin layered carbon assembly (NSLCA) with high N (9.5%) and S (1.7%) contents as an advanced anode material for SIBs. A petroleum-derived sulfur- containing pitch is chosen as the carbon skeleton, thus simplifying the preparation steps and reducing the costs. With the help of nanoporous MgO templates, the ultrathin layered carbon assembly can be facilely prepared. In addition, benefitting from the synergistic effects of codoped abundant N and S, as well as its unique assembly structures, the NSLCA anode exhibits outstanding sodium storage performance, with an especially superior rate performance (256 mA h g⁻¹ at a current density of 3 A g⁻¹) and a long lifespan (charge–discharge for as many as 2000 cycles with no capacity decay). This study provides a feasible and convenient strategy for the convenient and batch production of a spongy-like N, S-codoped carboneous material towards the construction of high-performance and cost-effectiveness SIBs.

钠离子电池（SIBs）因其成本效益高、能量密度高和资源丰富而受到越来越多的研究。然而，由于层间距很小，目前用于锂离子电池 (LIB) 的商业石墨基材料与 SIB 负极不兼容。在此，我们设计了一种非常方便的模板策略来合成具有高 N (9.5%) 和 S (1.7%) 含量的海绵状 N、S 共掺杂超薄层状碳组件 (NSLCA)，作为 SIB 的高级负极材料。选择石油衍生的含硫沥青作为碳骨架，从而简化了制备步骤并降低了成本。借助纳米多孔 MgO 模板，可以轻松制备超薄层状碳组件。此外，受益于共掺杂大量 N 和 S 的协同效应，^-1在 3 A g ^-1的电流密度下）和长寿命（充放电多达 2000 次循环而没有容量衰减）。该研究为方便批量生产海绵状 N, S 共掺杂碳质材料以构建高性能和成本效益的 SIBs 提供了一种可行且方便的策略。