MnO based composites are regarded as advanced conversion-type anode materials for lithium-ion batteries (LIBs) due to the low cost and high theoretical specific capacities (∼756 mA h g⁻¹). Nevertheless, the undesirable structural stability and sluggish electrochemical reaction kinetics of the electrode materials lead to poor lithium storage performance. Herein, inspired by the structure of areca, the areca-like core-shell MnO@C composites containing of the MnO core and N-doped porous carbon shell are prepared via a biomass-assisted strategy. The formation mechanism of the MnO@C composites with well-defined core-shell structure are successfully clarified through heterogeneous contraction and carbon pyrolysis processes. As anodes for LIBs, the MnO@C composite delivers superior specific capacities of 915.9 and 218.1 mA h g⁻¹ at 0.1 and 5.0 A g⁻¹, respectively, and maintains outstanding cycling performance over 900 cycles at 1.0 A g⁻¹. More importantly, electrochemical kinetics tests further confirm that the improved LIBs capacity mainly originated from the unique areca-like core-shell structure and self-N doped porous carbon shell.

MnO 基复合材料由于低成本和高理论比容量（~756 mA hg ^-1）。然而，电极材料不良的结构稳定性和缓慢的电化学反应动力学导致锂存储性能不佳。在此，受槟榔结构的启发，通过生物质辅助策略制备了含有 MnO 核和 N 掺杂多孔碳壳的类槟榔核壳 MnO@C 复合材料。通过非均相收缩和碳热解过程，成功阐明了具有明确核壳结构的 MnO@C 复合材料的形成机制。作为 LIB 的负极，MnO@C 复合材料在 0.1 和 5.0 A g ^{-1 下}分别提供了 915.9 和 218.1 mA hg ^{-1 的}优异比容量，并在 1.0 A g ^{-1 下}保持了超过 900 次循环的出色循环性能. 更重要的是，电化学动力学测试进一步证实了LIBs容量的提高主要源于独特的类槟榔核壳结构和自N掺杂的多孔碳壳。