Construction of novel electrode materials is an effective way to enhance the electrochemical performance of lithium ion batteries (LIBs). In this work, double-shell SnO₂@Fe₂O₃ hollow spheres are fabricated through a simple template method. It is revealed that the α-Fe₂O₃ nanorods are heterogeneously assembled on the surfaces of hollow SnO₂ spheres. The double-shell SnO₂@Fe₂O₃ hollow spheres, as an anode material for LIBs, demonstrate excellent lithium storage capacity and cycling stability. Their discharge specific capacity decreases to 464 mA h g⁻¹ for the 46th cycle at a current density of 100 mA g⁻¹, and then increases significantly to 1043 mA h g⁻¹ up to the 190th cycle. Compared with SiO₂@SnO₂ (221 mA h g⁻¹ after 190 cycles) and SnO₂ (336 mA h g⁻¹ after 190 cycles) electrodes, the better electrochemical performance of the SnO₂@Fe₂O₃ electrode is ascribed to its hierarchical hollow urchin-like structure, the SnO₂@Fe₂O₃ heterojunctions and the oxygen vacancies in the α-Fe₂O₃ nanorods. The sea urchin-like heterostructures dramatically inhibit the agglomeration and prevent the volume expansion during the cycling process. This work provides a novel way to construct a promising material with enhanced performance as an anode for LIBs.

中文翻译：

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双壳SnO2 @ Fe2O3空心球作为锂离子电池的高性能负极材料

新型电极材料的构造是增强锂离子电池（LIB）电化学性能的有效方法。在这项工作中，通过简单的模板方法制造了双壳SnO ₂ @Fe ₂ O ₃空心球。据透露，在的α-Fe ₂ ö ₃纳米棒被非均相组装中空SnO的表面上的₂球体。作为LIBs的负极材料，双壳SnO ₂ @Fe ₂ O ₃空心球表现出出色的锂存储能力和循环稳定性。它们的放电比容量降至464 mA hg ^-1在第46周期时，电流密度为100 mA g ^-1，然后显着增加到1043 mA hg ^-1，直到第190周期。与SiO ₂ @SnO ₂（190个循环后为221 mA hg ^-1）和SnO ₂（190个循环后为336 mA hg ^-1）电极相比，SnO ₂ @Fe ₂ O ₃电极具有更好的电化学性能。分级中空海胆状结构，所述的SnO ₂ @Fe _2个ö _3个异质结和在氧空位的α-Fe ₂ ö ₃纳米棒。海胆状的异质结构显着抑制了团聚并阻止了循环过程中的体积膨胀。这项工作提供了一种新颖的方法来构建具有前途的材料，该材料具有增强的性能，可作为LIB的阳极。