摘要
用电沉积方法在Cu集流体上分别制备出用于锂离子电池负极材料的密集细粒状(<0．5μm)和分散粗粒状(≈3μm)两种Sn薄膜电极．用X射线衍射、扫描电镜、循环伏安及充、放电实验研究比较了两电极的组织与性能．结果表明,在氟硼酸盐溶液中使用以醛类为主的复合添加剂,在静止条件下可制得细粒Sn薄膜电极,在搅拌条件下可制得粗粒Sn薄膜电极;细粒Sn薄膜电极比粗粒Sn薄膜电极具有较优的初始嵌锂容量和循环稳定性:细粒Sn薄膜电极首次放电比容量达到787 mA·h／g,40次循环时放电比容量仍保持在630 mA·h／g;而粗粒Sn薄膜电极首次放电比容量只有576 mA·h／g,至20次循环放电比容量降至150 mA·h／g．
Two kinds of Sn thin film electrodes, consisted of fine and compact Sn particles （less than 0.5 μm） and large and separated Sn particles （about 3 μm）, as negative materials for lithium-ion batteries were prepared by electrodeposition onto copper foil collector. Their structures and performances were studied with XRD, SEM, cyclic voltammetry and charging discharging experiments. The two kinds of film electrodes were prepared in fluoborate solution containing additives under stirred and unstirred conditions, respectively. The former shows the better discharge capacity and cyclic stability than the latter. The discharge capacities of the former are 787 mA·h/g for the first cycle and 630 mA·h/g after 40 cycles, but those of the latter are only 576 mA·h/g for the first cycle and 150 mA·h/g after 20 cycles.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第5期515-520,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金项目20373016
广东省和广州市科技攻关计划项目2006A10704003和2006Z3-D2031资助
关键词
电沉积
SN
锂离子电池
负极材料
electrodeposition, tin, lithium ion battery, anode material
