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以催化领域广泛使用的微孔“择形”分子筛ZSM5为填料,通过溶液浇铸法制得PEO-LiClO4-LiZSM5全固态复合聚合物电解质膜.实验表明LiZSM5的引入可以显著地提高体系的离子电导率,25℃时PEO10-LiClO4-10％LiZSM5的离子电导率达到1.4×10-5 S·cm-1.利用交流阻抗-稳态电流相结合的方法对体系的锂离子迁移数进行了测定,表明掺入LiZSM5后锂离子迁移数明显升高.电化学稳定窗口实验表明PEO-LiClO4-LiZSM5复合聚合物电解质在全固态锂离子二次电池领域具有良好的应用前景.
In this paper, PEO-LiClO4-LiZSM5 all-solid polymer electrolyte membrane was prepared by the solution casting method with the microporous “shape selective” molecular sieve ZSM5 widely used in the field of catalysis.It was shown that the introduction of LiZSM5 can significantly improve the ionic conductivity of the system, The ionic conductivity of PEO10-LiClO4-10% LiZSM5 reaches 1.4 × 10-5 S · cm-1 at 25 ℃ .According to the combination of AC impedance and steady state current, the lithium ion mobility of the system was measured, The number of Li-ion migration into LiZSM5 significantly increased.The electrochemical stability window experiments show that PEO-LiClO4-LiZSM5 composite polymer electrolyte has good application prospects in the field of all-solid-state lithium ion secondary batteries.