The combination of carbon fiber and MnO is considered as a promising strategy to enhance the electrochemical performance of MnO. Herein, the carbon fiber/MnO/C composite material was fabricated using cotton with pyrrole as the carbon source through two-step pyrolysis with KOH as the activator. The irregular shaped MnO particles with a carbon coating of about 1 nm thickness were embedded on the surface of the carbon fiber. Benefiting from this unique structure, the composite material demonstrated remarkable electrochemical performance. It retained 35.3% of the initial discharge capacity (1239 mA·h·g⁻¹) at 0.1 A g⁻¹. Under the stepwise increase of the current densities from 0.1 to 3 A g⁻¹, a superior rate capability was obtained compared to that for MnO/C (30.2%) and MnO (26.4%). Moreover, the material manifested an outstanding long-term tolerance over 200 cycles. This excellent electrochemical performance is on account of the one-dimensional carbon fiber and the surrounding carbon coating, which not only enhances the electronic connectivity and conductivity but also facilitates the transportation of lithium ions as well as preventing the agglomeration of MnO nanoparticles during the electrochemical cycle. This work introduces a facile scalable approach of utilizing sustainable biomass materials to make electrodes for high-power lithium-ion batteries.

碳纤维和 MnO 的组合被认为是提高 MnO 电化学性能的有前途的策略。以棉花为碳源，以KOH为活化剂，通过两步热解法制备碳纤维/MnO/C复合材料。具有约1nm厚碳涂层的不规则形状的MnO颗粒嵌入碳纤维表面。得益于这种独特的结构，该复合材料表现出卓越的电化学性能。它在 0.1 A g ^{-1 时}保留了初始放电容量 (1239 mA·h·g ^-1 ) 的35.3% 。在电流密度从 0.1 到 3 A g ^-1的逐步增加下，与 MnO/C (30.2%) 和 MnO (26.4%) 相比，获得了更高的倍率性能。此外，该材料在超过 200 次循环后表现出出色的长期耐受性。这种优异的电化学性能归功于一维碳纤维和周围的碳涂层，它不仅增强了电子连接性和导电性，而且有利于锂离子的传输以及防止电化学循环过程中MnO纳米颗粒的团聚. 这项工作介绍了一种利用可持续生物质材料制造高功率锂离子电池电极的简便可扩展方法。