Preparation Of Tin-Based Alloy/Graphene Composites And Appliation In Battery

As a new two-dimensional carbon material, graphene has received considerable interest due to its high surface areas, high conductivity and stable electrochemistry activity. In addition, the tailored design of Sn-based bimetallic alloys has attracted considerable interests because of their surface effects, interface effects, and the small size effect, etc. The integration of graphene and Sn-based bimetallic alloys should present special features in the new hybrids, and could be potentially applied in Li-ion battery, supercapacity, biosensors, and catalysts, etc.In this dissertation, we firstly used the polyol wet-chemistry method to obtain a high dispersion of Pt3Sn NPs on graphene. Then, we used the polyol wet-chemistry method to obtain the uniform SnSb alloys nanoparticles, and assembled them on graphene directly without further modification in the process of the reduction of graphene oxide. These formed Sn based graphene composites have been characterized by scanning electron microscope (SEM), transmission electron microscopic (TEM) images, X-ray powder diffraction (XRD) patterns, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), etc. In addition, the obtained composites have shown enhanced electrochemical performance in the Li-ion battery and electrochemical studies.