纳米SnO的溶胶-凝胶法制备与电化学性能  

Preparation and Electrochemical Properties of Nano-SnO by Sol-Gel Technique

作　　者：何则强[1] 熊利芝[1] 肖卓炳[1] 麻明友[1] 吴显明[1] 黄可龙[2] 

机构地区：[1]吉首大学化学化工学院,吉首416000 [2]中南大学化学化工学院,长沙410083

出　　处：《无机化学学报》2006年第2期253-257,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金项目(No.200376086);湖南省教育厅优秀青年项目(No.04B016);中国博士后科学基金项目(No.2005037700);中南大学博士后科学基金项目(No.2004107)资助

摘　　要：以氯化亚锡、草酸和无水乙醇为原料,采用溶胶-凝胶法制备了纳米SnO粉末,并用热重-差热分析、X-射线衍射分析、透射电镜和扫描电镜等多种电化学方法对其进行了表征。结果表明,采用溶胶-凝胶法可以制备出粒度分布较集中,平均粒径在20nm左右的纳米SnO粉末。该纳米SnO的可逆容量达到607mAh·g-1,经80次循环后平均每次循环的容量损失只有0.056%,说明纳米SnO是一种优秀的高容量锂离子电池负极材料。Nano-SnO powders were prepared by sol-gel technique using tin dichloride, oxalic acid and dehydrated alcohol as raw materials, and characterized by thermogravimertric （TG） analysis and differential thermal analysis （DTA）, X-ray diffraction （XRD）, transmission electron microscope （TEM）, scanning electron microscopy （SEM） in combination with various electrochemical methods. Results show that nano-SnO powders with narrow size distribution around 20 nm could be obtained by calcinating the precursor at 500 ℃ for 6 h. Nano-SnO delivers a re- versible capacity of 607 mAh·g^-1 and the capacity loss per cycle is about 0.056% after being cycled 80 times, which indicates that nano-SnO powders are good anode materials with high capacity for Li ion battery applications.

关 键 词：氧化亚锡 纳米材料 溶胶-凝胶法 锂离子电池 负极 

分 类 号：O611.62[理学—无机化学] O614.43[理学—化学]