The one-step preparation and electrochemical characteristics of tin dioxide nanocrystalline materials

摘要

Tim dioxide nanocrystallines were prepared by one-step synthesis method- using amphiphilic P123 as a template. The crystalline nanomaterials present the uniform nano-size 15 nm and somewhat ordered porous meso-frameworks with average pores sizes of 3.5 and 9.5 nm. Meanwhile, the nanomaterials as the anode materials in lithium ion battery deliver high reversible capacity 792 mAh g~(-1) in the first cycle, which is equal to the theoretical capacity. No aggregation of nano-tin particles was observed and the cracking of structure by the large volume change is efficiently limited owing to the porous mesostructured nanomaterials in the charge/discharge processes. The improved electrochemical properties are attributed to the particle size and structure of materials.