Free-standing nitrogen doped V-O-C nanofiber film as promising electrode for flexible lithium-ion batteries

Flexible vanadium and nitrogen co-modified amorphous carbon nonwoven films are successfully synthesized and applied as free-standing film anodes for lithium-ion batteries (LIBs). The developed films exhibit outstanding capacity with an initial Coulombic efficiency of 63.3%. Furthermore, favorable rate capability and good cycling stability are achieved. Cycling at a current density of 0.1 A g^-1, the specific capacity of the nitrogen doped V-O-C nanofiber film reaches as high as 1380 mA h g^-1, showing considerable promise for use as an electrode for flexible lithium-ion batteries.