SnO_2纳米空心球的合成及在锂离子电池正极方面的应用(英文)  

Simple synthesis of SnO_2 hollow nanospheres and application in Lithium-ion battery anodes

作　　者：曹艳霞[1] 王万杰[1] 王经武[1] 陈荣峰[2] 

机构地区：[1]郑州大学材料科学与工程学院,郑州450001 [2]河南省科学院,郑州450002

出　　处：《功能材料与器件学报》2009年第1期75-78,共4页Journal of Functional Materials and Devices

摘　　要：采用锡盐溶液浸渍-煅烧锯末法，制备了SnO2纳米空心球。分别用X射线衍射（XRD）、透射电子显微镜（TEM）、高分辨透射电子显微镜（HRTEM）及恒流充放电技术对产品的结构形态和电化学性质进行了表征。结果表明，SnO2空心球的尺寸在50-120nm之间，壳层厚度约为5nm。在作为锂离子电池正极使用时，初始放电容量为607．7mAhg^-1。SnO2 hollow nanospheres were prepared by the simple heat treatment of sawdust impregnated by SnCl4 water solution in alkaline conditions. The crystallographic structure of the sample was determined X - ray powder diffraction （XRD）. The structure and morphology of these hollow SnO2 nanostructures were investigated by transmission electron microscopy （TEM） and high -resolution transmission electron microscopy （HRTEM）. The formation mechanism of SnO2 hollow sphere was studied by TEM preliminarily; it indicates that microspheres containing Sn -ion were formed in the impregnating process. The electrochemical Li - insertion of hollow SnO2 anodes were measured by the galvanostatic charge - discharge technique. Preliminary testing indicates that the initial charge capacity of 607.7 mAh g^-1 is higher than that of carbon - based materials （ theoretically 372.0 mAh g^- 1 ）.

关 键 词：二氧化锡 纳米空心球 锂离子电池 

分 类 号：TB34[一般工业技术—材料科学与工程]