锂离子电池负极SnO2的制备与电化学性能  

Preparation and Electrochemical Performance of SnO_2 as Anode Material of Lithium-ion Battery

作　　者：张利华[1] 王剑华[2] 郭玉忠[2] 蒋训雄[1] 

机构地区：[1]北京矿冶研究总院,北京100044 [2]昆明理工大学,昆明650093

出　　处：《有色金属》2008年第1期7-10,共4页Nonferrous Metals

基　　金：国家自然科学基金资助项目(20363002)

摘　　要：以聚碳酸酯膜作为模板结合溶胶-凝胶技术制备SnO2纳米管状阵列,用X射线衍射及扫描电镜对材料的结构及形貌进行表征,通过0.1mA.cm-2恒流充/放电试验,研究材料的嵌脱锂特性等电化学性能。结果表明,电池最大可逆放电容量为663mAh/g,最大可逆充电容量为656mAh/g,平均每次放电容量衰减率为0.77%,平均每次充电容量衰减率为0.88%,充/放电效率维持在95%以上的稳定水平。SnO2纳米管状阵列锂离子电池负极材料克服了一般的锡氧化物循环性能差的缺点,因此有希望成为一种较好的负极材料。The SnO2 nano-tube structure is prepared by using the Sol-Gel-Template processing, and the templates are polycarbonate filtration membranes. The crystal structure and configuration of the product are characterized by X-ray diffraction（XRD） and scanning electron miscopy（SEM）. The electrochemical performances of the SnO2 nano-tube structure on intercalation and disintercalation of lithium into tin-oxide materials are investigated by galvanostatic charge/discharge experiments. The results show that the highest reversible discharge/charge capacifies of this batteries are 663/656 mAh/g, and the average discharge/charge attenuation ratio are 0.77%/ 0.88 %, respectively, and the charge/discharge efficiency is above 95 %. The bad cycle performance of the general tin oxides is overcome by use of the SnO2 nano-tube structure of the lithium-ion batteries. These indicate that the materials can be the candidate for negative electrode of lithium-ion batteries.

关 键 词：电化学工程 SNO2 纳米管状阵列 负极材料 锂离子电池 

分 类 号：TM910[电气工程—电力电子与电力传动] TB383[一般工业技术—材料科学与工程]