NiFe₂O₄ has been regarded as one of the promising candidates for lithium-ion battery (LIB) anode materials due to its high theoretical specific capacity. However, the large volume expansion and pulverization of NiFe₂O₄ during the charge/discharge process result in severe capacity fading. Herein, heterostructured NiFe₂O₄-C nanorods have been successfully fabricated by recovering transition metals from simulated electroplating sludge leaching solution. The constructed NiFe₂O₄-C heterointerface plays a vital role in accommodating volume change, stabilizing the reaction products and providing rapid electron and Li⁺ ion transportation ability, resulting in a high and stable Li⁺ accommodation performance. The fabricated NiFe₂O₄-C nanorods demonstrate a high specific capacity (889.9 mA h g⁻¹ at 100 mA g⁻¹), impressive rate capability (861.5, 704.5, 651.4, 579.6 and 502.1 mA h g⁻¹ at 0.2, 0.6, 1.0, 2.0 and 5.0 A g⁻¹) and cycling stability (650.2 mA h g⁻¹ at 2 A g⁻¹ after 500 cycles). This work exemplifies a facile and effective approach for the fabrication of high performance LIB electrode materials by recycling metals from electroplating sludge in an application-oriented manner.

中文翻译：

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通过过渡金属再循环从高性能锂离子电池的模拟电镀污泥浸出溶液中构建异质结构NiFe2O4-C纳米棒。

由于其高的理论比容量，NiFe ₂ O ₄被认为是锂离子电池（LIB）负极材料的有希望的候选者之一。然而，在充电/放电过程中NiFe ₂ O ₄的大体积膨胀和粉化导致严重的容量衰减。本文中，通过从模拟电镀污泥浸出液中回收过渡金属，成功地制备了异质结构的NiFe ₂ O ₄ -C纳米棒。所构建的NiFe ₂ O ₄ -C异质界面在适应体积变化，稳定反应产物并提供快速电子和Li ⁺方面起着至关重要的作用。离子输送能力强，产生高而稳定的Li ⁺调节性能。所制造的NiFe ₂ ö ₄ -C纳米棒表现出高的比容量（889.9毫安汞柱^-1在100mA克^-1），令人印象深刻的速率能力（861.5，704.5，651.4，579.6和502.1毫安汞柱^-1在0.2，0.6，1.0、2.0和5.0 A g ^-1）和循环稳定性（500个循环后，在2 A g ^-1下为650.2 mA hg ^-1）。这项工作举例说明了通过以面向应用的方式回收电镀污泥中的金属来制造高性能LIB电极材料的便捷有效方法。