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首页> 外文期刊>RSC Advances >In situ synthesis of hierarchical mesoporous Fe3O4@C nanowires derived from coordination polymers for high-performance lithium-ion batteries
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In situ synthesis of hierarchical mesoporous Fe3O4@C nanowires derived from coordination polymers for high-performance lithium-ion batteries

机译：配位聚合物衍生的分级介孔Fe3O4 @ C纳米线的原位合成，用于高性能锂离子电池

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A facile two-step strategy is developed for in situ fabrication of hierarchical nanostructured Fe3O4@C mesoporous nanowires. Coordination polymers that served as a precursor and self-template are hydrothermally synthesized in the first step, and subsequently thermally treated in an inert atmosphere. Well-defined mesoporous nanowires that are assembled from a large number of core-shell structured Fe3O4@C spherical particles with an ultrasmall and uniform size (similar to 8 nm) are successfully obtained. As a proof-of-concept application, they are used as anode materials for lithium-ion batteries. These Fe3O4@C mesoporous nanowires exhibit excellent electrochemical performance with high reversible capacity, good cycling stability and rate capability. The remarkable electrochemical performance is due to the effective combination of ultrasmall and uniform Fe3O4 nanoparticles, mesoporous nanowire structures and carbon networks, which simultaneously supply a high contact area, mitigate the volume change during the lithiation/delithiation process, and enhance the electronic conductivity.
机译：开发了一种方便的两步策略，用于原位制备分级纳米结构的Fe3O4 @ C介孔纳米线。在第一步中水热合成用作前体和自我模板的配位聚合物，然后在惰性气氛中进行热处理。成功地获得了由大量具有超小且均匀尺寸（类似于8 nm）的核-壳结构的Fe3O4 @ C球形颗粒组装而成的定义明确的介孔纳米线。作为概念验证应用，它们被用作锂离子电池的负极材料。这些Fe3O4 @ C介孔纳米线具有出色的电化学性能，具有高可逆容量，良好的循环稳定性和倍率性能。卓越的电化学性能归因于超小且均匀的Fe3O4纳米粒子，中孔纳米线结构和碳网络的有效结合，同时提供高接触面积，减轻了锂化/脱锂过程中的体积变化，并增强了电子导电性。

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