Flexible SnO2/N-doped carbon nanofiber films as integrated electrodes for lithium-ion batteries with superior rate capacity and long cycle life

A freestanding SnO@N-CNF film prepared by electrospinning exhibits excellent flexibility and a high surface area of 506 m g. When used as an anode for lithium-ion batteries, a high reversible capacity of 754 mAh g is maintained after the 300 cycle at 1 A g. Even when the current density increases to 5 A g, the SnO@N-CNF still delivers 245.9 mAh g