均苯型聚酰亚胺锂电池复合隔膜的电化学性能  

Electrochemical Performances of Polypyromelliticimide Composite Membrane for Li-Ion Battery

作　　者：丁军[1] 孔瑛[1] 杨金荣[1] 

机构地区：[1]中国石油大学(华东)重质油国家重点实验室,山东青岛266555

出　　处：《高分子材料科学与工程》2012年第12期40-43,共4页Polymer Materials Science & Engineering

摘　　要：为了替代传统的聚烯烃微孔膜,对均苯型聚酰亚胺(ODA/PMDA)复合锂电池隔膜进行了研究。制备的聚酰亚胺(PI)/聚对苯二甲酸乙二醇酯(PET)复合膜孔径在0.2μm左右,孔径大小适宜,孔径分布均匀;复合隔膜具有较高的孔隙率和离子电导率。PI/PET复合膜较好的耐热性,使复合膜组装的锂电池具有安全性和较好的电池性能。电池性能测试表明,复合膜组装的锂电池具有优良的放电容量保持率和大倍率放电性能。The polyimide composite membrane was prepared as the separator for Li-ion batteries in order to replace the traditional microporous polyolefin membrane. The pore size of composite membrane which is desirable for separator of Li-ion battery is about 0.2μm. The distribution of pore size is homogenized. The separator has high porosity and ionic conductivity. The superior thermal stability of PI/PET composite membrane makes that, the button cell has well battery performance and safety. Battery performance tests show that the cells with PI/PET composite membrane exhibit the good capacity retention and rate capabilities.

关 键 词：聚酰亚胺 复合膜 隔膜 锂电池 

分 类 号：TB383[一般工业技术—材料科学与工程]