Abstract
Core–shell LiFePO 4/C nanocomposite has been prepared by a sol–gel method. The mean size of the spherical core LiFePO 4 is about 30 nm, and thickness of carbon shell is about 3 nm. The bonding character on the interface of core–shell was revealed by soft X-ray absorption spectroscopy (XAS). The as-prepared sample was characterized by X-ray diffraction (XRD), Raman spectrum, Transmission electron microscope (TEM) and High-resolution transmission electron microscopy (HRTEM). Charge-discharge tests show the core–shell LiFePO 4/C demonstrates high rate capability (106 mAh g −1 at 20 C) and good cycling performance (negligible capacity loss after 250 cycles).
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