Preparation and electrochemical properties of LiFePO4/graphene composites from tailoring graphene oxides

• DOI: 10.1007/s11581-016-1641-1
• Publication Date: 2016-01-15T15:43:00Z
• Authors: Y. H. Ding; W. Xie; P. Zhang
• Keywords: Graphene foam

LiFePO4/graphene composites have been prepared by using tailoring graphene oxide (GO) nanosheets as precursors. The structure and electrochemical properties of the composites were investigated by X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), Raman microscopy, and a variety of electrochemical testing techniques. The decrease in graphene size reduces the contact resistance between activated materials, and enhances the lithium-ion transport in LiFePO4/graphene composites. With low weight fractions of small-size graphene sheets, the composites show better electrochemical performance than those with large size graphene sheets.