Abstract
LiVPO4F has attracted increasing research interest in the field of Li-ion batteries due to its high working voltage platform and high theoretical energy density. However, the construction of stable LiVPO4F cathode material with excellent electrochemical properties is still a major challenge. Herein, we successfully synthesized spherically shaped LiVPO4F/C via a spray drying–roasting method. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results indicate that the well crystallized LiVPO4F/C with triclinic structure shows spherical morphology with an average diameter of 1–3 μm. The spherically shaped LiVPO4F/C delivers a discharge capacity of 137.9 mAh·g−1 at 0.1C rate in the range of 3.0–4.5 V and remains 91.4% capacity retention of its initial discharge capacity after 50 cycles. These results reveal that spray drying–roasting method is a promising approach to synthesize spherically shaped LiVPO4F/C cathode material with stable crystal structure and excellent performance.
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