Flexible Sn0₂/n-doped carbon nanofiber films as integrated electrodes for lithium-ion batteries with superior rate capacity and long cycle life

Abstract

A freestanding SnO₂ @N-CNF film prepared by electrospinning exhibits excellent flexibility and a high surface area of 506 m²g⁻¹ . When used as an anode for lithium-ion batteries, a high reversible capacity of 754 mAh g⁻¹ is maintained after the 300(th) cycle at 1 A g⁻¹ . Even when the current density increases to 5 A g⁻¹ , the SnO2 @N-CNF still delivers 245.9 mAh g⁻¹ .