PEO类聚合物基体的改性及其高性能电解质材料研究的新进展

New Progress of the Research on the Modification of PEO Polymer Matrix and Its High-performance Solid Polymer Electrolyte Materials

聚氧化乙烯(PEO)是聚合物电解质传统的基体材料,它最大的优势在于在不添加任何增塑剂的情况下,可以与锂盐形成稳定的络合物,但PEO易于结晶,使离子电导率降低。研究表明:采用共混、接枝、共聚、交联以及与无机物复合等方法对PEO进行改性,可以进一步提高此类聚合物电解质的性能。重点对PEO类聚合物基体的改性及其高性能固体聚合物电解质材料研究的新进展进行介绍,并对其研究前景做了展望。

Polyethylene oxide （PEO） is a traditional matrix material of polymer electrolyte. Its greatest advantage lies in forming a stable lithium salt complex without any plasticizing agent. But the easy crystallization characteristic of PEO leads to decline of ionic conductivity. Previous studies confirmed the effectiveness of modifying PEO ma- trix to improve the properties of the polymer electrolytes, by using blending, grafting, copolymerization, crosslinking, and forming composite with inorganic compounds. In this paper, we provide a general description about the la- test progress on modification of PEO polymer matrix and its high-performance solid polymer electrolyte materials, and give brief prospects on the future research.