Owing to the special structural characteristics, oxide derivatives of Prussian blue (PB)-based hollow structures are widely used in electrochemical energy storage and conversion. Here, Fe3O4 particles have been synthesized by one-step thermal decomposition of PB. The cube-sized iron-based PB and structural stability of thermal decomposition products at different amount of polyvinyl pyrrolidone (PVP) were well investigated. In the derivatived architecature, the hollow Fe3O4 nanocubes provide high-efficiency lithium ion transporation and the diffusion of electrolyte, enabling better electrochemical performance. The as-obtained Fe3O4 nanocubes show a remarkable rate capability (462[Formula: see text]mAh[Formula: see text]g[Formula: see text] at 1.0[Formula: see text]A/g) and outstanding specific capacity (803[Formula: see text]mAh[Formula: see text]g[Formula: see text] at 0.1[Formula: see text]A/g, 97.5% capacity retention over 140 cycles), which have a potential application as anode materials for lithium ion batteries due to the facile preparation method and high electrochemical performance.

中文翻译：

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制备源自普鲁士蓝的均匀 Fe3O4 纳米立方体并增强锂存储性能

由于特殊的结构特性，基于普鲁士蓝（PB）的空心结构的氧化物衍生物被广泛用于电化学储能和转换。在这里，铁3○4通过PB的一步热分解合成了颗粒。对不同用量聚乙烯吡咯烷酮 (PVP) 的立方体尺寸铁基 PB 和热分解产物的结构稳定性进行了深入研究。在衍生架构中，空心铁3○4纳米立方体提供高效的锂离子传输和电解质的扩散，从而实现更好的电化学性能。获得的 Fe3○4纳米立方体表现出卓越的倍率能力（462[公式：见正文]mAh[公式：见正文]g[公式：见正文]在1.0[公式：见正文]A/g）和出色的比容量（803[公式：见正文] text]mAh[Formula: see text]g[Formula: see text] at 0.1[Formula: see text]A/g, 97.5%容量保持率超过140次循环），具有作为锂离子电池负极材料的潜在应用制备方法简便，电化学性能高。