鼓膜法表征锂电池用锡膜的弹性模量  

Characterization of the Elastic Modulus of Tin Films Used for Cathodes of Lithium-Ion Batteries by Bulge Tests

作　　者：戴翠英[1,2,3] 潘勇[1,2,3] 马增胜[1,2,3] 雷维新[1,2,3] 王子菡[1,2,3] 

机构地区：[1]湘潭大学材料科学与工程学院,湘潭411105 [2]湘潭大学特种功能薄膜材料国家地方联合工程实验室,湘潭411105 [3]材料设计及制备技术湖南省重点实验室,湘潭411105

出　　处：《现代应用物理》2015年第4期293-298,共6页Modern Applied Physics

基　　金：国家自然科学基金资助项目(11372267);湖南省科技厅项目(2013GK3163;2014TT2037)

摘　　要：采用电沉积方法制备了用作锂电池负极材料的锡膜,并利用扫描电镜和X射线衍射仪对其表面形貌和织构进行表征。利用鼓膜法和数字散斑相关法,对锡膜的鼓包变形进行了高精度的全场位移测量。根据测定的薄膜压力及独立膜中心点挠度曲线,结合圆形鼓膜理论模型,实验测得厚度为125μm的锡膜平均弹性模量约为23.325 GPa。A tin film used for the cathode of lithium batteries was synthesized by using electro-deposition technique, and its surface morphology and crystal orientation were characterized by a scanning electron microscope and an X-ray diffractometer, respectively. A bulge test was carried out to measure the full-field deformation of the 125 μm-thick tin cathode with the aid of digital speckle correlation method. The elastic modulus of the tin cathode was estimated according to the recorded pressure-deflection data and the bulge equation of a circular membrane. The results indicate that the average elastic modulus is about 23. 325 GPa, which is in good agreement with that from other available data.

关 键 词：鼓膜实验 锡膜 全场位移 弹性模量 

分 类 号：O348.1[理学—固体力学]