车用锂离子电池隔膜特性的试验研究

摘要

Four kinds of commercialized separator film product for lithium-ion battery are selected, the composition and structural features of separator film materials are characterized by means of FT-IR spectrometer, XRD and SEM, and their thermal performances are analyzed by TGA and DSC. In addition, the mechanical and heat-resistant performances, as well as liquid absorbency of separator film material are also tested. The results show that non polyolefin separator film has better heat-resistant performance, but poorer mechanical performance.%选取了4种锂离子电池的商品化隔膜产品,采用傅立叶变换红外光谱仪、X射线衍射仪和扫描电子显微镜等手段,对隔膜材料的组成和结构特性进行表征；采用热重分析仪和差示扫描量热仪,对隔膜材料的热性能进行分析；同时,进行隔膜材料的机械性能、耐热性能和吸液性的试验.结果表明,非聚烯烃类隔膜具有较好的耐热性能,但机械性能较差.