The emerging wearable and foldable electronic devices drive the development of flexible lithium ion batteries (LIBs). Carbon materials are considered as one of the most promising electrode materials for LIBs due to their light weight, low cost and good structural stability against repeated deformations. However, the specific capacity, rate capability and long-term cycling performance still need to be improved for their applications in next-generation LIBs. Herein, we report a facile approach for immobilizing phosphorus into a large-area carbon nanosheets/nanofibers interwoven free-standing paper for LIBs. As an anode material for LIBs, it shows high reversible capacity of 1100 mAh g⁻¹ at a current density of 200 mA g⁻¹, excellent rate capabilities (e.g., 200 mAh g⁻¹ at 20,000 mA g⁻¹). Even at a high current density of 1000 mA g⁻¹, it still maintains a superior specific capacity of 607 mAh g⁻¹ without obvious decay.

新兴的可穿戴和可折叠电子设备推动了柔性锂离子电池（LIB）的发展。碳材料因其重量轻，成本低和抗反复变形的良好结构稳定性而被认为是LIB最有希望的电极材料之一。但是，其在下一代LIB中的应用仍然需要提高比容量，速率能力和长期循环性能。在这里，我们报告了一种简便的方法，可将磷固定到LIBs的大面积碳纳米片/纳米纤维交织自立式纸中。作为LIB的负极材料，它在200 mA g ^-1的电流密度下显示出1100 mAh g ^-1的高可逆容量，出色的倍率能力（例如200 mAh g ^-1在20,000 mA g ^-1时）。即使在1000 mA g ^-1的高电流密度下，它仍可保持607 mAh g ^-1的优良比容量，而不会出现明显的衰减。