凝胶聚合物电解质在二次电池的研究进展

Research progress of gel polymer electrolytes in secondary batteries

近年来,由于电子器件发展迅猛,所以对其储能装置提出更加严格的要求,二次电池作为目前的主流储能产品,其发展对科技进步也发挥着极为重要的作用,而电解质作为电池的重要组成部分之一,对电池的各方面性能都承担着关键性的作用,凝胶聚合物电解质以其较高的电导率,及较好的力学性能和优异安全性成为当前电解质研究的焦点。本文总结了近年来聚环氧乙烷、聚丙烯腈、聚甲基丙烯酸甲酯、聚偏二氟乙烯/聚偏二氟乙烯-六氟丙烯和生物基凝胶聚合物电解质在二次电池上的研究进展,主要介绍了上述聚合物电解质基体的基本特质,并探讨了目前凝胶聚合物电解质存在的问题以及改进方法,通过添加辅助成分及对基体的结构改性,可有效地提高电解质的性能,同时对凝胶聚合物电解质的未来发展做了展望。

In recent years,due to the rapid development of electronic devices,stricter requirements have been put on its energy storage devices.As the current mainstream energy storage products,secondary batteries have played an extremely important role in the progress of science and technology.Electrolyte,one of the important components,plays a key role in all aspects of battery performance.Gel polymer electrolytes have become the focus of current electrolyte research due to their higher electrical conductivity,better mechanical properties and excellent safety.In this article,the research progress of polyethylene oxide,polyacrylonitrile,polymethyl methacrylate,polyvinylidene fluoride/polyvinylidene fluoride-hexafluoropropylene,and bio-based gel polymer electrolytes in secondary battery in the recent years was summarized.The basic characteristics of the above polymer electrolyte matrix were mainly introduced,and the problems and improvement methods of the current gel polymer electrolyte were discussed.By adding auxiliary components and modifying the structure of the matrix,it could effectively improve the performance of the electrolyte.At the same time,the future development of the gel polymer electrolyte was prospected.