摘要
取0.2 mol/L的Li4Ti5（OEt）19（acac）5[acac-为乙酰丙酮基]为前驱体,经溶胶-凝胶后在600℃加热2 h制得纳米Li4Ti5O12粉体,产物通过X射线衍射（XRD）、粒度分布仪、拉曼光谱（Raman）与差热-热重进行表征。实验表明,前驱体中含有acac-基团,它可以阻止团聚现象;以获得的纳米Li4Ti5O12粉体（粒径为15-20 nm）作为锂电池负极材料,实际循环容量约为164 mAh/g,电池循环性能稳定,使用寿命长。
The xerogel was prepared by a direct sol-gel process of 0.2 mol/L Li4Ti5 （OEt）19 （acac）5 as the precursor and was heated at 600 ℃ for 2 h to obtain the nano-Li4TiO12 powder. The products were characterized by Raman spectroscopy, thermogravi mentry-differential thermal analysis （TG- DTA）, X-ray diffraction（XRD） and partide size analyzer. The experiments reveales that the precursor contained acac-group, which could prevent the precursor from gathering. The nano-Li4Ti5O12 of 15- 20 nm was thus obtained. The nano-Li4Ti5O12 was used as the negative electrode material of lithiumion battery and the reversible cycle capability was about 164 mAh/g. The battery had a steady performance and a long using-life.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2007年第6期1332-1335,共4页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金资助项目(20476001)
安徽省教育厅自然科学基金重点项目(2005KJ019ZD)
安徽省自然科学基金资助项目(070414270X)
淮南师范学院科研重点项目(2006LKP01ZD)
