Tin Nanoparticles Encapsulated in Porous Multichannel Carbon Microtubes: Preparation by Single-Nozzle Electrospinning and Application as Anode Material for High-Performance Li-Based Batteries

摘要

Rechargeable lithium ion batteries are one of the favorite energy storage devices for upcoming mobile electric devices and hybrid vehicles because of their high energy density and long cycle lifetime.Tin metal has been proposed as one of the most promising anode candidates because of its high theoretical capacity of ~992 mAh g~(-1) (formation of Li_(4.4)Sn).However, implementation of metallic tin for lithium ion battery applications has been greatly hampered by the poor cyclability resulting from both pulverization of particles and electrical disconnection from the current collector caused by the large volume variation during the lithium alloying and dealloying processes.Substantial efforts have been made to increase its performance, including modifying the electrode configuration, decreasing the particle size,using thin films,and selecting optimized binders.