二氧化锡填充碳纳米管与锂离子存储性能

摘要

Tin dioxide （SnO2） nanoparticles were successfully filled into the cavity of carbon nanotubes （CNTs） by using a novel molten salt filling method at a low temperature, and the mass fraction of SnO2 is up to 60%. The SnO2@CNTs showed higher lithium ions storage capacity and better charge-discharge cycling performance than SnO2 nanoparticles, which is attributed to the unique structure of SnO2@CNTs： the CNTs buffer the destroy coming from the volume charge during the charge-discharge process, provide more space for the storage of lithium ions and enhance the conductivity of composite material.%通过一种新颖的低温熔盐填充的方法成功地制备了二氧化锡（SnO2）填充碳纳米管（CNTs）的材料,SnO2的质量分数达到了60%。制备的复合材料相比于SnO2纳米颗粒,具有更高的锂离子存储容量,更好的充放电循环表现。良好的锂离子存储性能归功于独特的复合结构：包覆的CNTs缓冲了SnO2在充放电过程中体积变化所引起的应力破坏,提供了额外的锂离子存储空间,并提高了整体材料的导电性。