Abstract
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 (~600 mAh g−1) and superior cycle stability over 1000 cycles.
Published Version
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