锂离子电池Sn薄膜电极厚度对其电化学性能的影响  

Effect of Thickness of Sn Film Electrode in Lithium Ion Batteries on Its Electrochemical Performances

作　　者：李昌明[1,2] 赵灵智[3] 刘志平[1] 张仁元[2] 李伟善[3] 尹荔松[1] 胡社军[1,3] 

机构地区：[1]五邑大学,广东江门529020 [2]广东工业大学,广东广州510090 [3]华南师范大学,广东广州510631

出　　处：《稀有金属材料与工程》2010年第3期507-510,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50771046);广东省自然科学基金(8452902001000275)项目资助

摘　　要：用电沉积方法在铜集流体上分别制备出不同厚度(2,0.5,0.25,0.12μm)的锡薄膜电极。用扫描电镜观察其表面形貌、以充放电实验比较其性能。结果表明,减小Sn薄膜厚度可改善电极的循环性能,但首次容量损失也增大。0.5μm厚的Sn薄膜具有最高的放电容量和较好的循环稳定性;其首次放电比容量为749mAh/g,40次循环时放电比容量仍保持578mAh/g。Sn film electrodes with different thickness （2, 0.5, 0.25, 0.12μm）, as anode materials for lithium-ion batteries were prepared by electrodeposition onto copper foil collector. Their microstructures were observed by SEM and the performances were studied through charging-discharge experiments. Result show that the performances of Sn film electrodes can be improved by the thickness decrease, but the first reversible capacity loss was increased at the same time. The electrode of 0.5 μm thickness shows the highest discharge capacity and better cyclic stability： its discharge capacity is 749 mAh/g for the first cycle and keeps 578 mAh/g after 40 cycles.

关 键 词：锡薄膜 厚度 锂离子电池 负极材料 

分 类 号：TM912[电气工程—电力电子与电力传动]