一维纳米结构SnO2的制备及其电化学性能研究  

Preparation and Electrochemical Properties of One-diamension SnO2

作　　者：张文庆[1] 韩红梅[1] 宁欣[1] 

机构地区：[1]河南科技学院,新乡453003

出　　处：《重庆科技学院学报（自然科学版）》2009年第5期66-68,共3页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：河南省教育厅科技攻关资助项目（2007480001）

摘　　要：以SnCl4·5H2O、水合肼为原料，采用水热法制备一维纳米结构SnO2。X射线衍射（XRD）、扫描电镜（SEM）和透射电镜（TEM）结果表明：制备的一维纳米结构的SnO2为四方相结构，其直径为0．5～2．5μm，长度约几百微米。恒电流充放电测试结果显示：在电流密度为160mA·h·g^-1（0．2C）时，该SnO2材料的首次放电容量为1780mA·h·g^-1，第20周期放电容量保持到468mA·h·g^-1；从第3周期开始，库仑效率均保持在90％以上。以上结果表明这种材料具有较高的储锂容量和较好的可逆性能。SnO2 were prepared using SnCl4 ·5H2O and Hydrazinium hydroxide as precursors by a hydrothermal chemical reaction. Investigations on X-ray Diffraction（XRD）, scanning electron microscopy（SEM） and transmission electron microscopy （TEM） indicated that the products were SnO2 with tetragonal structure; the diameters and length were 0.5-2.5μm and hundreds of micro-meter, respectively. The electrochemical properties of the one-diamension SnO2 were investigated by galvanostatic cycling. The discharge capacity in the 1 st cycle was 1780 mA.h.gl at a current density of 160 mA .h .g^-1 （02. C） and the discharge capacity at the 20 st cycle was 468 mA .h .g^-1, the coulombic efficiency were above 90% from the 3 rd cycle, which indicated that this material has a higher high-lithium storage capacity and excellent reversibility. Additionally, the easy of preparation and cheap price also made this method very promising in lithium-ion batteries.

关 键 词：电化学 锂离子电池 SNO2 

分 类 号：O657[理学—分析化学]