Nanostructures have received great attention to improve the performance of lithium-ion batteries, due to their advantages in dealing with critical issues associated with large volume change, low electrical conductivity, and slow rate of Li⁺ diffusion. To realize large lithium storage capacity and excellent rate capability of iron oxide electrode. Carbon-modified three-dimensional porous iron oxide was prepared by chemical reaction with in situ formation of templating agent followed by the calcination is reported herein. Benefit from the regulation of the number of pores in the precursor, part of Fe is oxidized to Fe₃O₄ and part of Fe is peroxidized to Fe₂O₃, thus forming Fe₂O₃/Fe₃O₄ heterostructure during oxidation process. Attributed to its unique structural feature, the 3D Fe₂O₃/Fe₃O₄-C heterostructure electrode for the anode of lithium-ion batteries exhibits outstanding rate capability, i.e., 911.4, 797.9, 736.3, 597.8, and 402.6 mAh g⁻¹ at 0.3, 1.0, 2.0, 5.0, and 10.0 A g⁻¹, respectively, and high reversible capacity, i.e., 929.1 mAh g⁻¹ at a low current density of 300 mA g⁻¹.

中文翻译：

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具有较大表面积的3D多孔氧化铁/碳作为锂离子电池的高级负极材料

纳米结构因其在处理与体积变化大，电导率低和Li ⁺扩散速度慢相关的关键问题上的优势而受到人们的极大关注，以改善锂离子电池的性能。实现大的锂存储容量和优异的氧化铁电极倍率性能。碳改性的三维多孔氧化铁是通过化学反应与原位形成模板剂并随后煅烧制备的。受益于前体中孔的数量的调节，部分Fe被氧化为Fe ₃ O ₄，部分Fe被过氧化为Fe ₂ O ₃，从而形成Fe ₂ O₃ / Fe ₃ O ₄氧化过程中的异质结构。归功于其独特的结构特征，该三维的Fe ₂ ö ₃ / Fe的₃ ö ₄的锂离子电池表现出杰出的速率能力的阳极-C异质电极，即，911.4，797.9，736.3，597.8，和402.6毫安克^{- 1}在0.3，1.0，2.0，5.0和10.0 A G ^-1，分别和高可逆容量，即929.1毫安克^-1在300毫安g的低电流密度^-1。