Hollow structured mixed metal oxides (MMOs) with porous outer shell have recently been emerged as advantageous candidates for energy conversion and storage applications due to their outstanding electrochemical properties. In this report, the novel bi-component-active hollow CoFe₂O₄@Fe₃O₄ nanospheres with the mesoporous outer shells (HCFO-POS) were successfully prepared by ultrasonic spray pyrolysis method. The as-synthesized HCFO-POS was evaluated as an anode material for lithium-ion battery (LIB), it exhibits excellent electrochemical properties for lithium storage. To be specific, it can deliver a decent specific capacity of 365 mAh g⁻¹ even at a high current density of 1000 mA g⁻¹ with cycling stability up to 500 cycles. The aforementioned excellent performance of this HCFO-POS electrode can be explained based on i) unique mesoporous nature which could buffer the volume change, shorten the diffusion path of Li⁺ ions during the lithiation/delithiation process, enhances the effective contact area between electrolyte/electrode interface and finally. ii) synergistic effect of mixed metal oxides which helps to improve the conductivity of the electrode.

具有多孔外壳的空心结构混合金属氧化物（MMO）最近因其出色的电化学性能而成为能量转换和存储应用的有利候选者。在本报告中，通过超声喷雾热解方法成功地制备了具有介孔外壳的新型双组分活性空心CoFe ₂ O ₄ @Fe ₃ O ₄纳米球。合成后的HCFO-POS被评估为锂离子电池（LIB）的负极材料，它具有出色的锂存储电化学性能。具体而言，即使在1000 mA g ^-1的高电流密度下，它也可以提供365 mAh g ^-1的体面比容量具有高达500个循环的循环稳定性。HCFO-POS电极的上述优异性能可以基于以下条件来解释：i）独特的介孔性质，可以缓冲体积变化，缩短锂离子/去锂化过程中Li ⁺离子的扩散路径，增强电解质/锂离子电池之间的有效接触面积电极接口，最后。ii）混合金属氧化物的协同作用，有助于提高电极的电导率。