通过对不同聚硅氧烷（PDMS）含量的聚氧化乙烯-聚硅氧烷（PEO-PDMS）聚合物电解质电化学性能的测试,确定出PDMS最佳添加量,并以此聚合物配比为基体,通过复合不同质量分数的离子液体1-丁基-3-甲基咪唑双三氟甲磺酰亚胺盐（[BMIM]TF-SI）或N-甲基、丙基哌啶双三氟甲磺酰亚胺盐（PP13TFSI）,制备得到不同体系的离子液体复合聚合物电解质膜。离子液体的加入可显著提高聚合物电解质的室温电导率,样品PPP-100%室温电导率达到5.6×10-4S/cm。同时,样品均具有良好的热学和电化学稳定性。通过两种体系聚合物电解质性能对比得知,PP13TFSI离子液体复合聚合物电解质具有更优性能,有望作为新型电解质材料应用在锂离子电池中。
A series of PEO-PDMS polymer electrolytes were prepared.The optimum ratio of PDMS was determined according to the result of electrochemical performance tests on PEO-PDMS polymer electrolyte.Then the ionic liquid composite polymer electrolytes were synthesized by adding TFSI or PP13TFSI to PEO-PDMS.The introduce of ionic liquid increases the ionic conductivity of polymer electrolyte significantly.The sample PPP-100% reaches 5.6×10-4S/cm at room temperature.Meanwhile,all samples exhibit good thermal and electrochemical stability.Through comparing,it is found that PP13 TFSI composite polymer electrolyte has better performance,and is hopefully to be used as new polymer electrolyte in lithium batteries.
参考文献
| [1] | Shibata M.;Yosomiya R.;Seki M.;Kobayashi T. .Polymer electrolytes based on blends of poly(ether urethane) and polysiloxanes[J].European Polymer Journal,2000(3):485-490. |
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