Abstract Carbon coated Fe3Se4 (Fe3Se4/C) composites are synthesized on a large scale by facile solid-state reaction between the commercial FeC2O4·2H2O and selenium powders using citric acid as carbon source. The Fe3Se4/C composites with porous structures are composed of aligned carbon coated nanorods. As anode material, the Fe3Se4/C composites show higher reversible discharge specific capacity and cycling stability than unmodified Fe3Se4, performing 711.1 mAh g−1 and 551 mAh g−1 for first and second discharge capacities at 0.1 A g−1, and delivering a reversible capacity of 434.4 mAh g−1 at 1 A g−1 with a capacity retention of 98.3% after 100 cycles. The improved electrochemical properties could be ascribed to the introduction of coated carbon, enhancing structure stability during cycling and improving the electrical conductivity.

中文翻译：

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大规模合成由排列的纳米棒组装的 Fe 3 Se 4 /C 复合材料作为先进的锂存储负极材料

摘要 以柠檬酸为碳源，通过市售的FeC2O4·2H2O与硒粉的固相反应，大规模合成了碳包覆的Fe3Se4(Fe3Se4/C)复合材料。具有多孔结构的 Fe3Se4/C 复合材料由排列的碳涂层纳米棒组成。作为负极材料，Fe3Se4/C 复合材料比未改性的 Fe3Se4 显示出更高的可逆放电比容量和循环稳定性，在 0.1 A g-1 下第一次和第二次放电容量分别为 711.1 mAh g-1 和 551 mAh g-1，并提供了1 A g-1 时的可逆容量为 434.4 mAh g-1，100 次循环后容量保持率为 98.3%。电化学性能的改善可归因于涂层碳的引入，增强了循环过程中的结构稳定性并提高了电导率。