High-Capacity Anode Material for Lithium-Ion Batteries with a Core–Shell NiFe2O4/Reduced Graphene Oxide Heterostructure,ACS Omega

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High-Capacity Anode Material for Lithium-Ion Batteries with a Core–Shell NiFe2O4/Reduced Graphene Oxide Heterostructure
ACS Omega ( IF 3.7 ) Pub Date : 2021-09-23 , DOI: 10.1021/acsomega.1c03050
Chang Liu ₁ , Tong Zhang ₁ , Lixin Cao ₁ , Kun Luo ₁

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A novel composite consisting of transition-metal oxide and reduced graphene oxide (rGO) has been designed as a highly promising anode material for lithium-ion batteries (LIBs). The anode material for LIBs exhibits high-rate capability, outstanding stability, and nontoxicity. The structural characterization techniques, such as X-ray diffraction, Raman spectra, and transmission electron microscopy, indicate that the material adopts a unique core–shell structure with NiFe₂O₄ nanoparticles situated in the center and an rGO layer coated on the surface of NiFe₂O₄ particles (denoted as NiFe₂O₄/rGO). The NiFe₂O₄/rGO material with a core–shell structure exhibits an excellent electrochemical performance, which shows a capacity of 1183 mA h g^–1 in the first cycle and maintains an average capacity of ∼1150 mA h g^–1 after 900 cycles at a current density of 500 mA g^–1. This work provides a broad field of vision for the application of transition-metal-oxide materials in electrodes of lithium-ion batteries, which is of great significance for further development of lithium-ion batteries with excellent performance.

中文翻译：

具有核壳NiFe2O4/还原氧化石墨烯异质结构的锂离子电池高容量负极材料

一种由过渡金属氧化物和还原氧化石墨烯 (rGO) 组成的新型复合材料已被设计为一种极具前景的锂离子电池 (LIB) 负极材料。LIBs 的负极材料具有高倍率性能、出色的稳定性和无毒性。X 射线衍射、拉曼光谱和透射电子显微镜等结构表征技术表明，该材料采用独特的核壳结构，NiFe ₂ O ₄纳米颗粒位于中心，rGO 层涂覆在其表面。 NiFe ₂ O ₄颗粒（表示为NiFe ₂ O ₄ /rGO）。NiFe ₂ O ₄具有核壳结构的 /rGO 材料表现出优异的电化学性能，在第一次循环中显示出 1183 mA hg ^–1的容量，并在 500 的电流密度下循环 900 次后保持~1150 mA hg ^–1的平均容量毫安 g ^–1。该工作为过渡金属氧化物材料在锂离子电池电极中的应用提供了广阔的视野，对进一步开发性能优异的锂离子电池具有重要意义。

更新日期：2021-10-06

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