锂离子电池用PEO改性聚合物固态电解质的研究进展

Progress of PEO-modified polymer solid electrolytes for lithium ion batteries

随着便携式电子设备不断的发展,其核心部件电池的能量密度和安全性越来越受到人们的关注。固态电池可避免使用安全系数较差的有机液态电解液及易燃的聚烯烃隔膜,具有高能量密度和高安全性等特征,因而被称为下一代锂离子电池。固态电池的核心技术在于开发离子电导率高、不易燃、强韧性好、环境友好型的新型固态电解质,其中PEO基聚合物电解质属于新型固态电解质中的一种。概述了PEO基聚合物电解质的研究进展,并对PEO基聚合物固态电解质提出了展望。

With the development of portable electronic devices,the demands for energy density and safety of their core components,i.e.lithium ions batteries(LIBs),are becoming much stricter.Since the solid-state battery can avoid the use of combustible organic liquid electrolytes and separators of flammable polyolefin,they show excellent advantages in energy density and safety,which are considered as the next-generation of LIBs.The core technology of solid-state batteries is to develop novel electrolytes with higher ionic conductivity,non-flammability,considerable mechanical properties,flexibility and environmental friendliness.As one of the best electrolytes of solid-state batteries,PEO-based polymers show strong competitiveness.Therefore,in this work,the progress associating to PEO-based polymer electrolytes was summarized and their prospects were presented.