Abstract

A NiFe₂O₄/expanded graphite (NiFe₂O₄/EG) nanocomposite was prepared via a simple and inexpensive synthesis method. Its lithium storage properties were studied with the goal of applying it as an anode in a lithium-ion battery. The obtained nanocomposite exhibited a good cycle performance, with a capacity of 601 mAh g⁻¹ at a current of 1 A g⁻¹ after 800 cycles. This good performance may be attributed to the enhanced electrical conductivity and layered structure of the EG. Its high mechanical strength could postpone the disintegration of the nanocomposite structure, efficiently accommodate volume changes in the NiFe₂O₄-based anodes, and alleviate aggregation of NiFe₂O₄ nanoparticles.

Open image in new window

中文翻译：

---

镍铁的形成2个Ø4/具有优异锂存储性能的膨胀石墨纳米复合材料

摘要

通过简单且廉价的合成方法制备了NiFe ₂ O ₄ /膨胀石墨（NiFe ₂ O ₄ / EG）纳米复合材料。为了将其用作锂离子电池的负极，研究了其锂存储性能。所获得的纳米复合材料表现出良好的循环性能，在800次循环后，在1A g ^-1的电流下的容量为601 mAh g ^-1。这种良好的性能可以归因于EG的增强的电导率和分层结构。其高机械强度可以推迟纳米复合结构的崩解，有效地适应NiFe ₂ O ₄中的体积变化基阳极，并减轻NiFe ₂ O ₄纳米颗粒的聚集。

在新窗口中打开图像