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首页> 外文期刊>RSC Advances >A facile synthesis of Fe3O4 nanoparticles/graphene for high-performance lithium/sodium-ion batteries
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A facile synthesis of Fe3O4 nanoparticles/graphene for high-performance lithium/sodium-ion batteries

机译：用于高性能锂/钠离子电池的Fe3O4纳米粒子/石墨烯的容易合成

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In this study, a facile, simple, and inexpensive co-precipitation method is used to fabricate diamond-like Fe _(3) O _(4) nanoparticle/graphene composites for use as lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) electrode materials. In our synthesis, high-temperature treatment and complicated procedures and apparatus are avoided. Physical characterizations reveal that the as-prepared product is composed of a large fraction of diamond-like Fe _(3) O _(4) nanoparticles uniformly distributed on thin graphene nanosheets. Compared to bare Fe _(3) O _(4) and most of the previously reported studies, the as-obtained Fe _(3) O _(4) /graphene composite exhibits greatly enhanced electrochemical properties for both LIBs and SIBs, including excellent reversible capacity, superior cyclability and good rate performance. Specifically, when tested as an anode for LIBs, the Fe _(3) O _(4) /graphene composite shows specific capacity of 1430 mA h g ~(?1) after 100 cycles at 200 mA g ~(?1) . The initial discharge capacity tested in SIBs is 855 mA h g ~(?1) , and after 40 cycles, the discharge capacity stabilizes at ～210 mA h g ~(?1) for 250 cycles. The excellent performance can be attributed to the greatly improved electrical conductivity, large surface area and excellent stability of the electrode material.
机译：在该研究中，使用适用性，简单，廉价的共析出方法来制造金刚石的Fe _（3）o _（4）纳米颗粒/石墨烯复合材料用作锂离子电池（Libs）和钠离子电池（SIBS）电极材料。在我们的合成中，避免了高温处理和复杂的程序和设备。物理特征表明，由制备的产品由大部分的金刚石状Fe _（3）O _（4）α（4）纳米颗粒组成，均匀地分布在薄石墨烯纳米片上。与裸FE _（3）o _（4）和大多数先前报道的研究相比，AS获得的Fe _（3）O _（4）/石墨烯复合材料对LIBS和SIB的显着增强了电化学性质，包括优异的可逆能力，卓越的可靠性和良好的速率性能。具体地，当作为Libs的阳极测试时，Fe _（3）O _（4）/石墨烯复合材料显示在200mA G〜（α1）的100个循环后的1430mA H g〜（α1）的比容量。在SIB上测试的初始放电容量为855 mA H G〜（α1），在40次循环后，放电容量稳定在〜210mA H g〜（α1）中进行250个循环。优异的性能可归因于大大提高的电导率，大表面积和电极材料的优异稳定性。

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