Nanosized Spinel Li4Ti5O12 Anode Material Prepared by Gel-polymer Method using Furfuryl Alcohol as Polymerizable Solvent  

糠醇辅助的聚合凝胶法制备纳米Li4T5O12负极材料

作　　者：丁楚雄[1] 白耀彩[1] 魏丛[1] 陈春华[1] 

机构地区：[1]中国科学技术大学材料科学与工程系,中同科学院能量转换材料重点实验室,合肥230026

出　　处：《Chinese Journal of Chemical Physics》2012年第4期457-462,I0004,共7页化学物理学报（英文）

基　　金：V. ACKNOWLEDGMENTS This work was supported by the National Natural Science Foundation of China （No.20971117 and No.10979049） and the Education Department of Anhui Province （No.KJ2009A142）.

摘　　要：Nanosized Li4Ti5O12 powders are synthesized by a polymerization-based method using ti- tanium butoxide and lithium nitrate as precursors and furfuryl alcohol as a polymerizable solvent. The prepared samples are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Braunauer-Emmett-Teller （BET） analysis. The electrochemical performances of these Li4Ti5O12 powders are also studied. The effect of different surfactants including citric acid, polyvinylpyrrolidone, and cetyltrimethyl ammonium bromide on the structure and properties is also investigated. It is found that pure spinel phase of Li4Ti5O12 is obtained at an annealing temperature of 700 ℃ or higher. The use of surfactants can improve the powder morphology of nanosized particles with less agglomeration. With suitable annealing temperature and the addition of surfaetant, Li4Ti5O12 powders with high BET surface area and favorable electrochemical performance can be obtained.

关 键 词：Polymerization process Lithium ion battery LI4TI5O12 Nanoparticle Rate performance 

分 类 号：O[理学]