SnO2/TiO2?Nanocomposite Prepared by Pulsed Laser Deposition as Anode Material for Flexible Quasi-solid-state Lithium-Ion Batteries

摘要

SnO2/TiO2 nanoparticle structure were prepared by alternately depositing SnO2 and TiO2 by pulsed laserdeposition (PLD) system as the anode of lithium-ion batteries. The prepared SnO2/TiO2 electrodematerial has a high reversible capacity (809.30 mAh g-1capacity after cyclic testing for 100 times at acurrent density of 100 mA g-1) and a high rate capability (488.71 mAh g-1capacity at a current densityof 3000 mA g-1). The nanoparticle membrane structure significantly shortens the diffusion distance oflithium ions and effectively buffers the stress generated in the process of cyclic charging and discharging.Moreover, the two oxide particles, SnO2 and TiO2, are distributed at intervals throughout the electrode,which greatly limits the position migration of nanoparticles in the circulation process, thereby itsignificantly enhances the integrity and stability of the electrode structure in the circulation process.Besides, the SnO2/TiO2 film with nanoparticle structure was successfully applied to the flexible quasisolid-state batteries, which can easily light up the blue high-power LED in different bending states.These excellent electrochemical properties confirm the importance of our work for providing a newstrategy to produce anode materials for lithium-ion batteries. Our work may shed light on the design ofanode materials in high-performance lithium-ion batteries, exceptionally thin-film micro batteries andflexible lithium-ion batteries.