Li_4Ti_5O_(12)/石墨负极材料的湿法制备与电化学表征(英文)  

Wet Method Preparation and Electrochemical Characterization of Li_4Ti_5O_(12)/Graphite Anode Material

作　　者：何则强[1,2] 熊利芝[1,2] 梁凯[1] 

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

出　　处：《吉首大学学报（自然科学版）》2010年第1期91-95,共5页Journal of Jishou University(Natural Sciences Edition)

基　　金：Supported by National Natural Science Foundation of China(20376086);Postdoctoral Science Foundation of China(2005037700);Hunan Provincial Natural Science Foundation of China(07JJ3014);Scientific Research Fund of Hunan Provincial Education Depart ment(07A058);Postdoctoral Science Foundation of Central South University(2004107)

摘　　要：以无水乙醇为溶剂,醋酸锂、钛酸丁酯和石墨为原料,采用湿法制备了Li4Ti5O12/石墨复合材料.采用X-射线衍射、红外光谱、扫描电镜和电化学测试等对合成产物进行了表征.结果表明:600℃氩气气氛中煅烧6 h可制得碳质量分数5%左右的Li4Ti5O12/石墨复合材料,其可逆容量达到167.1 mAh.g-1;经80次循环后,0.1C放电时,容量保持率为99.0%,2.0 C放电时容量保持率达到105.1%.与纯Li4Ti5O12相比,Li4Ti5O12/石墨复合材料具有更好的循环性能和倍率性能,是一种优良的锂离子电池负极材料.Li4Ti5O12/graphite composite was prepared by sol-gel method using ethyl alcohol as solvent,lithium acetate and tetrabutyl titanate and graphite as raw materials.Li4Ti5O12/graphite composites were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM) combined with electrochemical tests.Results show that Li4Ti5O12/graphite composite with 5% carbon mass fraction containing can be obtained by annealing the precursor at 600 ℃ for 6 h in Ar atomophere.The composites can deliver a specific capa...

关 键 词：锂离子电池 LiTiO 负极 湿法 

分 类 号：TM912.9[电气工程—电力电子与电力传动]