In Situ Synthesis of FeSn2/Graphene Nanocomposite via One-Pot Solvothermal Route and Its Electrochemical Li-Storage Properties

In this work, a FeSn2/graphene nanocomposite was synthesized by a facile in situ one-pot solvothermal route. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectra (RS) results indicated that the formation of FeSn2 and the reduction of graphite oxide (GO) to graphene occur simultaneously during the one-pot solvothermal process. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations showed that the quasi-spheric FeSn2 particles with a size of 10-30 nm are uniformly anchored on graphene. The electrochemical Li-storage performance of the nanocomposite was investigated by galvanostatic cycling. The nanocomposite exhibits an obvious improved electrochemical performance compared to bare FeSn2. The enhancement of the electrochemical performance could be attributed to the introduction of graphene that not only constructs two-dimensional conductive networks but also disperses and confines the FeSn2 nanoparticles.