Abstract
Vanadium pentoxide (V2O5) as the cathode material has caused great concern in metal-ion batteries due to the diverse valence states of vanadium. However, structural instability and poor electrical and ionic conductivity significantly limit its application as high-efficiency electrodes. Herein, V2O5 nanosheet is directly grown on electrospun carbon nanofibers (V2O5@CNFs) by a hydrothermal method as a cathode for sodium-ion batteries. The carbon fiber skeleton can improve not only the conductivity but also buffer the volume variations of the electrodes. As the cathode of NIBs, the as-prepared V2O5@CNFs exhibits an excellent capacity of 178 mAh g−1 at 25 mA g−1 and 60 mAh g−1 at 1000 mA g−1.
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