文摘
Graphitized carbon (GC) and graphene (GE) modified Feb>2b>Ob>3b>/Lib>4b>Tib>5b>Ob>12b> (LTO) composites have been synthesized via a solid-state reaction, respectively. The structure, morphology and electrochemical performance of the materials have also been characterized with X-ray diffraction (XRD), scanning electron microscope (SEM) with an energy dispersive spectroscopy (EDS) system, X-ray photoelectron spectrometer (XPS), Fourier transform infrared spectroscopy (FTIR) and electrochemical measurements. The discharge capacities of Feb>2b>Ob>3b>/LTO, GC/Feb>2b>Ob>3b>/LTO and GE/Feb>2b>Ob>3b>/LTO are 100.2 mAh g−1, 207.5 mAh g−1 and 238.9 mAh g−1 after 100 cycles at the current density of 176 mA g−1. The cyclic stability and rate capability are in the order of GE/Feb>2b>Ob>3b>/LTO > GC/Feb>2b>Ob>3b>/LTO > Feb>2b>Ob>3b>/LTO because of the synergistic effect between GC (GE) and Feb>2b>Ob>3b>/LTO. Copyright