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.
参考文献
| [1] | Huang CB;Wang SQ;Zhang H;Li TT;Chen SL;Lai CL;Hou HQ .High strength electrospun polymer nanofibers made from BPDA-PDA polyimide[J].European Polymer Journal,2006(5):1099-1104. |
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