摘要

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-1is maintained after the 300thcycle 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.