Abstract
LiFePO4/C composites are prepared from amorphous FePO4 ∙ xH2O and are modified with crystalline metal oxide V2O5 by using a solid-state reaction process. The crystalline structure and the morphology of the synthesized powders have been characterized by using X-ray diffraction and scanning electron microscopy, and the electrochemical performances have been evaluated by using cyclic voltammetry measurements and galvanostatic charge/discharge tests. The vanadium, which is present as vanadium trioxide, is found to manipulate the residual amount of carbon in LiFePO4/C, which is related to the electrical conductivity of the material. Based on the investigated samples, the pristine LiFePO4/C material exhibits the best electrochemical properties. The results in this study indicate that surface modification with crystalline V2O5 may not be an effective way to improve the overall properties of LiFePO4/C, which is often used as a cathode for lithium-ion batteries.
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Islam, M., Ur, SC. & Yoon, MS. Electrochemical performance of LiFePO4/C cathode material modified with V2O5 . Journal of the Korean Physical Society 65, 52–56 (2014). https://doi.org/10.3938/jkps.65.52
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DOI: https://doi.org/10.3938/jkps.65.52