Flame-retardant flexible composite gel electrolyte material and preparation method and application thereof

The invention discloses a flame-retardant flexible composite gel electrolyte material and a preparation method and application thereof, and relates to the technical field of gel electrolyte preparation, and the preparation method comprises the following steps: uniformly mixing a first polymeric monomer, a second polymeric monomer, a cross-linking agent, a lithium salt, a plasticizer and a solid-state lithium lanthanum zirconium aluminum tantalum oxide ceramic nanofiber material; adding a photoinitiator, and uniformly stirring to obtain a mixed solution; uniformly coating to the surface of a substrate, and performing ultraviolet polymerization to prepare the flame-retardant flexible composite gel electrolyte material. The electrolyte material prepared by the invention is relatively flat in surface, shows excellent tensile property, has no obvious change in conductivity after being stretched, has excellent flame retardant property, and gives consideration to safety performance and flexible characteristics while