A superior cathode of sodium-ion battery: A V2O5 nanosheets anchored on carbon nanofibers

Abstract Vanadium pentoxide (V 2 O 5 ) as the cathode material has caused great concern in metal-ion batteries due to diverse valence states of vanadium. However, structural instability and poor electrical ionic conductivity significantly limit its application high-efficiency electrodes. Herein, V nanosheet is directly grown on electrospun carbon nanofibers @CNFs) by a hydrothermal method for sodium-ion batteries. The fiber skeleton can improve not only but also buffer volume variations As NIBs, as-prepared @CNFs exhibits an excellent capacity 178 mAh g ?1 at 25 mA 60 1000 .