Thapanee Sarakonsri

Abstract:

Tin/graphene (Sn/graphene) composites are prepared in nano-dimensions to be used as anode materials in lithium-ion batteries. The objectives of this research are enhancing both the energy density and mechanical stability of anodic electrodes from high theoretical capacity of Sn and graphene supported material, respectively. The chemical reduction method, which is the simple and low cost method, is used to prepare Sn on graphene. Sn particles are prepared by using SnCl2*2H2O, NaBH4 and ethylene glycol as Sn precursor, reducing agent and solvent, respectively. The effect of reducing SnCl2*2H2O precursor concentration in ethylene glycol solvent and the solvent viscosity on tin particle sizes is studied in this research. The solvent viscosity is varied by adding methanol to ethylene glycol solvent. The result from X-ray diffraction (XRD) technique shows that Sn phase contains the prepared products. The phase of products will be confirmed by transmission electron microscopy (TEM) technique. The results from scanning electron microscopy (SEM) technique will give the information about size and morphology of Sn particles. The condition of that smallest size of Sn obtained will be used to prepare 10 and 20%weight Sn on graphene composites. The charge-discharge voltage and the cycling performance of the products will be investigated. The results of the characterization will be discussed in the symposium.