Current location: JICS Archive > Vol. 7 > No. 3 > Articles : 21
High Rate Capability of Fe/FeO/Fe3O4 Composite as Anode Material for Lithium-Ion Batteries
L. Shi, Y.D. He, X.H. Xia, Z.M. Jian and H.B. Liu*
College of Materials Science and Engineering, Hunan University, Changsha Hunan 410082, China
Fe/FeO/Fe3O4 composite was synthesized by a simple solid method using ferric citrate and phenolic resin as raw materials. The reaction processes of raw materials mixture were characterized by thermogravimetric analysis (TGA) under nitrogen. X-Ray diffraction (XRD) and scanning electron microscopy (SEM) were used to investigate the structure and morphology of the products. The results showed that the obtained material was octahedral Fe/FeO/Fe3O4 composite with a size of 2-4 µm. The electrochemical performances of Fe/FeO/Fe3O4 composite as anode material were also evaluated, which exhibited a stable specific capacity of 260.3 mAh g-1 and an ideal initial coulombic efficiency of 90.8% in the range of 0.05~3 V at the 5C rate. A good rate capacity of Fe/FeO/Fe3O4 composite electrode was also shown by the charge-discharge testing even at the rate of 60C. The better rate capability of Fe/FeO/Fe3O4 electrode could be measured in higher temperature.
Keywords: Fe/FeO/Fe3O4 composite, High rate capability, Anode material, Lithium-ion batteries
