In this work, α-Fe₂O₃ double-layer hollow spheres with carbon coating (DLHS@C) are synthesized by a general “penetration-heterogeneous nucleation” approach using carbonaceous sphere templates combined with subsequent annealing. This hierarchy hollow sphere structure with carbon coating rationally combines three advantage aspects: shorten transport length for lithium ions and charges, sufficient void space to buffer the volume expansion, and enhanced electric conductivity. When tested for lithium storage, α-Fe₂O₃ DLHS@C composite electrode exhibits a high initial discharge capacity of 1735 mAh g^-1 and the reversible capacity of 823 mAh g^-1 after 100 cycles at the current density of 100 mA g^-1 in the voltage range of 0.01–2.5 V (vs. Li⁺/Li) and retains a capacity of 470 mAh g^-1 even at a large current density of 500 mA g^-1 after 500 cycles. The α-Fe₂O₃ DLHS@C electrode demonstrates excellent electrochemical properties with high capacity, good cycling stability, and excellent rate capability as potential anode material for lithium ion batteries.

在这项工作中，的α-Fe ₂ ö ₃双层碳涂层（DLHS @ C）空心球是通过使用碳质球模板和随后的退火结合一般的“渗透异质成核”的方法合成。这种带有碳涂层的分层空心球结构合理地结合了三个优点：缩短锂离子和电荷的传输长度，足够的空隙空间以缓冲体积膨胀以及增强的电导率。当用于锂存储测试的α-Fe ₂ ö ₃ DLHS @ C复合电极表现出的1735毫安g的高的初始放电容量^-1和823毫安克的可逆容量^-1在0.01–2.5 V（vs. Li ⁺ / Li）电压范围内，在100 mA g ^-1的电流密度下经过100次循环后，即使在500 mA g的大电流密度下也保持470 mAh g ^-1的容量500个循环后为^-1。所述的α-Fe ₂ ö ₃ DLHS @ C电极上显示了与高容量，良好的循环稳定性，并且作为锂离子电池阳极电位材料优异的倍率性能优异的电化学性能。