以淀粉为碳源制备锂离子电池负极用Sn／C复合材料的研究  

Study on the preparation of Sn/C anode composite for lithium-ion battery with corn starch as carbon source

作　　者：王红强[1] 汪艳芳[1] 李庆余[1] 王新宇[2] 张初华 颜志雄[1] 胡思江[1] 

机构地区：[1]广西师范大学化学化工学院,广西桂林541004 [2]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《应用化工》2008年第12期1401-1404,共4页Applied Chemical Industry

基　　金：国家自然科学基金项目(20663001,20763002);广西科学研究与技术开发项目(桂科能05112001-2D)

摘　　要：以玉米淀粉为碳源,锡酸钠为锡源,通过碳热还原的方法制备了Sn/C复合材料。采用XRD,SEM,TEM等手段对材料的结构和形貌进行表征。结果表明,以玉米淀粉为碳源,锡酸钠为锡源制备的Sn/C复合材料碳基体能对金属锡形成很好的分散和包覆,在结构上具有良好的稳定性;600℃处理得到的样品具有最佳的比容量和循环性能,其首次脱锂比容量为583 mA.h/g,循环10次后其充放电效率达95%。A new Sn/C composite material for lithium-ion battery anode was synthesized by carbonization and earbothermal reduction with corn starch as carbon source and sodium stannate as tin sources. X-ray diffraction （XRD）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM） were employed to determine the structure and configuration. The results showed that the Sn/C composite material from sodium stannate, the metal tin can be encapsulated and dispersed well by carbon-matrix. This structure has a good stability, and the sample handled in 600℃ shows the highest extraction capacity and the best cycle performance. Its first extraction lithium capacity is 583 mA· h/g, after 10 cycles the charge-discharge efficiency is above 95%.

关 键 词：淀粉 碳热还原 Sn/C复合材料 锂离子电池 

分 类 号：TQ127.1[化学工程—无机化工]