Abstract
A nanocomposite, consisting of conductive graphene intercalated with nanosized Li3V2(PO4)3/C hybrids, was successfully synthesized through a solution route followed by microwave irradiation. XRD results reveal that the crystal structure of graphene modified Li3V2(PO4)3/C remains unchanged. TEM images demonstrate that the Li3V2(PO4)3/C nanoparticles in the composite are well enwrapped by graphene. Compared to the pure Li3V2(PO4)3/C electrode, the graphene-decorated Li3V2(PO4)3/C nanocomposite exhibits an excellent high-rate capability and outstanding cycling stability. In the potential range of 3.0–4.8V, it delivers a high initial discharge capacity of 189mAhg−1 at a low rate of 0.1C, and maintains an initial discharge capacity of 143 at 10C. The superior performance can be attributed to the synergetic effect of the nanosized Li3V2(PO4)3/C particles and the conductive graphene wrapping layers. Therefore, we believe that this strategy can be used for the preparation of other graphene-based cathode or anode materials for high-rate lithium-ion batteries.
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