挤出压延工艺对锂电池隔膜成孔性能的影响  

Influence of Extrusion and Calendering Process on Pore-forming Properties of Lithium Battery Separator

作　　者：冯羽风 刘莉 陈志平[1] 黄孙息[1] 钟立松[1] 朱恒斌 FENG Yufeng;LIU Li;CHEN Zhiping;HUANG Sunxi;ZHONG Lisong;ZHU Hengbin(Guilin Electrical Equipment Scientific Research Institute Co., Ltd., Guilin 541004, China)

机构地区：[1]桂林电器科学研究院有限公司,广西桂林541004

出　　处：《绝缘材料》2019年第5期17-20,共4页Insulating Materials

基　　金：桂林市科学研究与技术开发计划(20140104-1)

摘　　要：采用双螺杆挤出机和三辊压延机制备了高密度聚乙烯-石蜡厚片,通过静态薄膜双向拉伸试验机对厚片进行拉伸制备了锂离子电池隔膜,研究挤出温度、压延冷却温度、片材厚度对隔膜成孔性能的影响。结果表明:随着挤出温度的升高,隔膜的孔径逐渐增大,孔隙率逐渐提高,但温度过高会导致隔膜的拉伸强度下降;随着压延冷却温度的升高,隔膜的孔径逐渐增大;随着片材厚度的增加,隔膜的孔径增大。A high density polyethylene(HDPE)-paraffin thick sheet was prepared by twin-screw extruder and three-roll calender, and then the thick sheet was stretched by static biaxial tensile machine to prepare lithium ion battery separator. The effect of extrusion temperature, calender cooling temperature, and sheet thickness on the pore-forming properties of lithium battery separator was studied. The results show that with the increase of extrusion temperature, the pore size and porosity of the separator increase, but the tensile strength would decrease if the extrusion temperature is too high. With the increase of calender cooling temperature, the pore size of the separator increases. With the increase of sheet thickness, the pore size of the separator increases.

关 键 词：锂电池隔膜 高密度聚乙烯 挤出压延工艺 成孔性能 

分 类 号：TM215.3[一般工业技术—材料科学与工程]