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首页> 外文期刊>Applied Surface Science >Oriented layered assemblies of graphene nanosheets/Fe_3O_4 nanoparticles as a superior anode material for lithium ion batteries
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Oriented layered assemblies of graphene nanosheets/Fe_3O_4 nanoparticles as a superior anode material for lithium ion batteries

机译：石墨烯纳米片/ Fe_3O_4纳米粒子的定向分层组件作为锂离子电池的高级阳极材料

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摘要

The development of more effective electrodes for lithium ion batteries requires increasing the specific surface area and improving the reversible capacity of the materials. We prepared a hybrid multilayer film consisting of graphene oxide (GO) nanosheets and iron oxide (Fe3O4) nanoparticles assembled using the Langmuir-Schaefer (LS) technique. The GO-Fe3O4 hybrid monolayer is formed by ligand exchange between GO suspended in the subphase and oleic acid-coated Fe3O4 nanoparticles dispersed at the liquid-gas interface. Transmission electron microscopy (TEM) and grazing incidence small angle X-ray scattering (GISAXS) results indicate that the GO-Fe3O4 composite monolayer at the interface possesses closely packed hexagonal structure of the Fe3O4 nanoparticles with high coverage upon monolayer compression. The multilayer GO-Fe3O4 hybrid materials were prepared by repeated LS deposition, exhibiting high reversible capacity (similar to 600 mAh g(-1)) and superior cycle stability over 1000 cycles.
机译：开发用于锂离子电池的更有效的电极需要增加比表面积并提高材料的可逆容量。我们准备了由Langmuir-Schaefer（LS）技术组装而成的由氧化石墨烯（GO）纳米片和氧化铁（Fe3O4）纳米粒子组成的杂化多层膜。 GO-Fe3O4杂化单层是通过悬浮在亚相中的GO与分散在液-气界面的油酸包覆的Fe3O4纳米颗粒之间的配体交换形成的。透射电子显微镜（TEM）和掠入射小角X射线散射（GISAXS）结果表明，界面处的GO-Fe3O4复合单层具有紧密堆积的Fe3O4纳米颗粒的六方结构，单层压缩后具有高覆盖率。多层GO-Fe3O4杂化材料是通过重复LS沉积制备的，具有高可逆容量（类似于600 mAh g（-1））和超过1000个循环的优异循环稳定性。

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