聚合物复合固体电解质材料研究进展

Progress on the Composite Solid Polymer Electrolytes

固体电解质是发展高安全、高能量密度全固态锂电池的重要材料基础。由聚合物相与无机相复合形成的聚合物复合固体电解质,兼具聚合物轻质、柔性,以及无机材料高强度、高稳定性等优势,是最具应用潜力的固体电解质材料。目前,制约聚合物复合固体电解质实际应用的主要瓶颈问题为其室温离子电导率较低。综述了目前关于聚合物复合固体电解质离子传导机制的科学认识以及提升其离子电导率的方法,分析了先进表征工具在揭示聚合物复合固体电解质离子传导机制方面的应用潜力,并展望了聚合物复合固体电解质未来的发展方向和工作重点。

Solid-state electrolytes are the materials basis for the development of all-solid-state lithium batteries with excellent safety and high energy density.Composite solid polymer electrolytes,comprised of polymer matrix and inorganic fillers,hold the greatest promising among all solid-state electrolytes,thanks to the light weight and flexibility of polymer matrix and the good mechanical strength and high stability of inorganic fillers.However,the low ionic conductivity at room temperature impedes the practical application of composite solid polymer electrolytes.This paper reviews the fundamentals and promotion strategies of the ionic conduction in composite solid polymer electrolytes.The potential role for advanced characterization tools in further investigating the mechanism of ionic conduction is emphasized.The future trends and key points of the development of composite solid polymer electrolytes are also proposed.