Herein, we introduce a facile strategy for constructing graphene-decorated CoFe₂O₄ nanoparticles (CoFe₂O₄/rGO) as anode material for Li-ion batteries. The CoFe₂O₄/rGO composites are synthesized via single step chemical synthesis method, which involves an in situ oxidation-reduction process between GO and Fe²⁺ and the subsequent nucleation and growth of CoFe₂O₄ onto the surface of rGO. Well-designed experiments are conducted to investigate the detailed formation mechanism of this kind of CoFe₂O₄/rGO hybrid. The key feature of this work is that by using the oxidizing characteristic of GO and reducing characteristic of Fe²⁺, toxic reducing agents, such as hydrazine and hydroquinone, can be avoid skillfully, which make the procedure more straightforward and economical. Compared with the pure CoFe₂O₄, the as-prepared CoFe₂O₄/rGO with a low rGO content of 16.7 wt% shows enhanced Li ion storage behaviors. It exhibits a high initial reversible capacity of 901.2 mAh g⁻¹ and a capacity retention of 80.7% after 100 cycles when operated at the current density of 200 mA g⁻¹.

在这里，我们介绍了一种简便的策略来构造石墨烯修饰的CoFe ₂ O ₄纳米颗粒（CoFe ₂ O ₄ / rGO）作为锂离子电池的负极材料。CoFe ₂ O ₄ / rGO复合材料是通过单步化学合成方法合成的，该方法涉及GO和Fe ²⁺之间的原位氧化还原过程，以及随后在rGO表面上成核和生长CoFe ₂ O ₄。进行了精心设计的实验，以研究这种CoFe ₂ O ₄的详细形成机理。/ rGO混合。这项工作的关键特征是，通过利用GO的氧化特性和Fe ^2+的还原特性，可以巧妙地避免使用有毒的还原剂，例如肼和对苯二酚，这使该过程更直接，更经济。与纯CoFe ₂ O _4相比，如此制备的具有16.7 wt％的低rGO含量的CoFe ₂ O ₄ / rGO显示出增强的锂离子存储行为。当在200 mA g ^-1的电流密度下运行时，它具有901.2 mAh g ^-1的高初始可逆容量和100个循环后的80.7％的容量保持率。