Delicate architecture of active material enables improving the performacne of lithium ion batteries. Environmental‐friendly Fe2O3 anode has high theoretical specific capacity (1007 mAh g−1) in lithium ion batteries, but suffers from structural collapsing and poor electronic conductivity. Herein, we design an unique hierarchical iron oxide by regulating the initial precursor prussian blue and targeting hollow‐shell structures with full consideration of temperature controls. Among them, Fe2O3 with a sheet‐crossing structure at 650°C, affords obvious advantages of improved electronic conductivity, short ionic diffusion length, prevented particle agglomeration, and buffer volume change. Thus, we achieve a superior discharge specific capacity of 611 mAh g−1 at 500 mA g−1. Regulating hierarchical structure of prussian blue‐assisted oxides enables effectively enchancing Li storge performance.

中文翻译：

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构建空心普鲁士蓝衍生氧化铁的分层壳孔隙以增强锂储存

活性材料的精细结构可以提高锂离子电池的性能。环保的 Fe2O3 负极在锂离子电池中具有很高的理论比容量（1007 mAh g-1），但存在结构坍塌和电子导电性差的问题。在此，我们通过调节初始前体普鲁士蓝并在充分考虑温度控制的情况下靶向空心壳结构，设计了一种独特的分级氧化铁。其中，Fe2O3 在 650°C 时具有片状交叉结构，具有明显的优势，即提高电子电导率、缩短离子扩散长度、防止颗粒团聚和缓冲体积变化。因此，我们在 500 mA g-1 下实现了 611 mAh g-1 的优异放电比容量。