Abstract The porous NiFe2O4/Si microspheres (NFO/Si) are prepared by nano silicon embedment into NFO using liquid nitrogen quenching and freeze-drying methods. Compared with pure nano silicon or NFO as lithium-ion battery anode, the porous NFO/Si microspheres deliver a promising specific capacity up to 906 mAh g−1 after 100 cycles at the current density of 0.1 A g−1. The composite electrode materials also demonstrate excellent rate performance at high current density. The improved electrochemical properties are due to the synergistic effect of high capacity silicon embedment in porous NFO/Si microspheres, which improves the Li+ intercalation–deintercalation process. The porous NFO/Si microspheres exhibits the excellent lithium-ion storage as anode materials.

中文翻译：

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纳米硅嵌入多孔NiFe2O4花微球具有改善的储锂性能

摘要 采用液氮淬火和冷冻干燥方法将纳米硅嵌入NFO中制备多孔NiFe2O4/Si微球(NFO/Si)。与作为锂离子电池负极的纯纳米硅或 NFO 相比，多孔 NFO/Si 微球在 0.1 A g-1 的电流密度下循环 100 次后可提供高达 906 mAh g-1 的比容量。复合电极材料在高电流密度下也表现出优异的倍率性能。电化学性能的改善是由于高容量硅嵌入多孔 NFO/Si 微球中的协同效应，这改善了 Li+ 的嵌入-脱嵌过程。多孔 NFO/Si 微球作为负极材料表现出优异的锂离子存储性能。