Transition metal oxides have been considered as the next lithium-ion batteries (LIBs) anode materials because of their ultrahigh specific capacity, tunable redox reaction, high stability, and low cost. However, their shortcomings of inherent large volume expansion (except titanium dioxide and vanadium pentoxide), low conductivity, and poor reaction kinetics seriously hinder the practical applications in LIBs. To overcome these problems, non-hierarchical heterostructure Fe₂O₃/Fe₂F₅ porous spheres (NHFs) are designed and successfully prepared by the simultaneously adsorption of fluoride ions during the formation of the precursor with a facile one-pot self-assembly approach. Compared with traditional counterparts, the NHF exhibits high structural stability and improved reaction dynamics upon repeated electrochemical lithiation/delithiation. Furthermore, NHF exhibits an outstanding reversible capacity of 765 mA h g⁻¹ at the current density of 0.2 A g⁻¹, an excellent rate capability of 265 mA h g⁻¹ at 10 A g⁻¹, and an eminent cyclability with a capacity retention of 87.4% after 3000 cycles.

过渡金属氧化物因其超高的比容量，可调节的氧化还原反应，高稳定性和低成本而被视为下一代锂离子电池（LIB）阳极材料。但是，它们固有的体积膨胀（二氧化钛和五氧化二钒除外），电导率低和反应动力学差的缺点严重阻碍了LIB的实际应用。为了克服这些问题，采用非分级异质结构Fe ₂ O ₃ / Fe ₂ F ₅通过便捷的一锅自组装方法，通过在前体形成过程中同时吸附氟离子来设计并成功制备了多孔球（NHF）。与传统的同类产品相比，NHF在反复进行电化学锂化/脱锂处理后具有较高的结构稳定性和改善的反应动力学。此外，NHF 在电流密度为0.2 A g ^-1时表现出出色的765 mA h g ^-1的可逆容量， 在10 A g ^-1时具有出色的265 mA h g ^-1的倍率能力，以及具有容量保持能力的出色循环能力3000次循环后为87.4％。