摘要
采用真空蒸镀法在铜片基底上沉积锡薄膜作为锂离子电池负极材料,对所制备的锡薄膜采用扫描电子显微镜、X射线衍射表征,研究了其表面形貌和组成。将制备的薄膜在手套箱中组装成CR2032型钮扣式电池,进行电化学测试,研究其电化学性能。实验结果表明,在相同蒸发时间和基底温度的条件下,随着蒸发功率的增加,沉积的锡颗粒逐渐增大,相应的电化学性能降低。以蒸发功率200 W、基底温度150℃制得的样品粒径为100～200 nm,含有Cu6Sn5合金相,以0.2C倍率充放电循环20周后放电容量达527 mA.h/g。
Sn thin films on Cu foil substrate were prepared by vacuum evaporation and investigated as the anode materials of rechargeable lithium-ion batteries. The surface morphology and composition of the asprepared films were characterized by scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The electrochemical performance of the film electrodes was measured using CR2032 coin-type cells. The experimental results show that the deposited films are co with increasing both the evaporation power and the substrate temperature. This behavior is correlated with the electrochemical performance of the film electrode. It is found that at 200 W and 150℃, the thin film with small particle of Cu6Sn5 phase displays a discharge capacity of 527 mA.h/g after 20 cycles.
出处
《应用化学》
CAS
CSCD
北大核心
2011年第8期918-923,共6页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金(20873071)
天津应用基础及前沿技术研究(08JCZDJC21300)资助项目
关键词
锡薄膜
真空蒸镀
锂离子电池
负极材料
tin film,vacuum evaporation,lithium-ion battery,anode material
