Abstract Iron-based anodes for lithium-ion batteries (LIBs) with higher theoretical capacity, natural abundance and cheapness have received considerable attention, but they still suffer from the fast capacity fading. To address this issue, we report a facile synthesis of plate-like carbon-supported Fe 3 C nanoparticles through chemical blowing/carbonization under calcination. The ultrafine Fe 3 C nanoparticles are prone to be oxidized when exposing in air; thus, Fe 3 C/C with mild oxidization and the fully oxidized product of Fe 2 O 3 /C are successfully prepared by controlling the oxidization condition. When applied as an anode material in LIB, the Fe 3 C/C electrode demonstrates excellent cycle stability (826 mAh·g −1 after 120 cycles under 500 mA·g −1 ) and rate performance (410.6 mAh·g −1 under 2 A·g −1 ), compared with the Fe 2 O 3 /C counterpart. The enhanced electrochemical performance can be ascribed to the synergetic effect of the Fe 3 C with mild oxidation and the unique hierarchical structure of plate-like carbon decorated with Fe 3 C catalyst. More importantly, this work may offer new approaches to synthesize other transition metal (e.g., Co, Ni)-based anode material by replacing the precursor ingredient. Graphic abstract

中文翻译：

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具有优异电化学性能的板状碳负载 Fe3C 纳米粒子

摘要 锂离子电池（LIBs）用铁基负极具有较高的理论容量、天然丰度和廉价等优点，受到了广泛关注，但仍存在容量衰减快的问题。为了解决这个问题，我们报告了一种通过化学发泡/煅烧碳化的板状碳负载 Fe 3 C 纳米颗粒的简便合成。超细Fe 3 C纳米粒子暴露在空气中容易被氧化；因此，通过控制氧化条件，成功制备了温和氧化的Fe 3 C/C和Fe 2 O 3 /C的完全氧化产物。Fe 3 C/C 电极用作锂离子电池负极材料时，表现出优异的循环稳定性（500 mA·g -1 下 120 次循环后为 826 mAh·g -1 ）和倍率性能（2 次下为 410.6 mAh·g -1 ） A·g -1 ), 与 Fe 2 O 3 /C 对应物相比。增强的电化学性能可归因于温和氧化的 Fe 3 C 和 Fe 3 C 催化剂装饰的板状碳的独特分级结构的协同作用。更重要的是，这项工作可能会提供新的方法来合成其他过渡金属（例如，Co、Ni）基负极材料，通过替换前驱体成分。图形摘要