Flame-retardant copolymer solid electrolyte as well as preparation method and application thereof

The invention provides a flame-retardant copolymer solid electrolyte as well as a preparation method and application thereof. The copolymer solid electrolyte comprises a polymerization monomer, a copolymerization agent, an initiator and a lithium salt, the polymeric monomer is 1, 3-dioxolame and a derivative thereof; the copolymerization agent is hexafluorocyclotriphosphazene and a derivative thereof. According to the flame-retardant copolymer solid electrolyte, the lithium ion conductivity close to that of a liquid electrolyte at normal temperature is realized, meanwhile, the battery cycle performance of the solid electrolyte at normal temperature can be remarkably improved, and the flame-retardant copolymer solid electrolyte has an extremely good application prospect. 本发明提供一种阻燃共聚聚合物固态电解质、制备方法及其应用，所述共聚聚合物固态电解质包括聚合单体、共聚剂、引发剂及锂盐；所述聚合单体为1,3二氧戊环及其衍生物；所述共聚剂为六氟环三磷腈及其衍生物。该阻燃共聚聚合物固态电解质实现了常温下接近液态电解质的锂离子电导率，同时可以显著提升固态电解质在常温下的电池循环性能，具有极好的应用前景。