Abstract
In this investigation, carbon-coated LiFePO4 cathode materials were synthesized with a facile hydrothermal method. The structure and electrochemical properties of the materials were investigated by X-ray diffraction (XRD), Roman, transmission electron microscopy-energy dispersive spectroscopy (TEM-EDS), and electrochemical impedance spectroscopy (EIS). By adjusting the mixing concentration of starting materials, a single-crystalline LiFePO4 with an anisotropic rhombus morphology (Space Group: Pmnb No. 62) were successfully synthesized. In addition, the carbon coated on the surface of LiFePO4 material prepared has a lower ID/IG (0.80), which indicates an optimized carbon structure with an increased amount of sp2-type carbon. Electrochemical performance test shows that the carbon-coated LiFePO4 cathode materials have an initial discharge capacity of 146 mAh g−1 at 0.2C.
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This work was supported by the Foundation of State Key Laboratory of Rare Earth Resources Utilization (RERU2013021).
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Qiao, Y., Pan, L., He, L. et al. Synthesis of single-crystalline LiFePO4 with rhombus-like morphology. Ionics 21, 295–299 (2015). https://doi.org/10.1007/s11581-014-1321-y
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DOI: https://doi.org/10.1007/s11581-014-1321-y