| abstract |
The invention discloses a polymer electrolyte and a preparation method and application thereof, wherein the polymer electrolyte comprises a polymer matrix, and the polymer matrix is composed of three blocks of acryl, urethane and phosphate ester. The polymer formed by the self-polymerization of the polymerized monomer, or the polymer formed by the copolymerization of the polymerized monomer composed of the three building blocks of acryl, urethane and phosphate ester and other monomers. The polymer electrolyte can be used in a battery, and the polymer matrix can undergo a self-crosslinking reaction at a high temperature of 130-190° C. to generate a dense thermosetting polymer that can cut off ion transport and prevent the occurrence of thermal runaway of the battery; and The self-crosslinking reaction is an endothermic reaction, which helps to quickly reduce the battery temperature and prevent the battery from thermal runaway; the polymer electrolyte can also capture free radicals and has intrinsic flame retardancy; the above characteristics of the polymer matrix work synergistically , which can effectively prevent the occurrence of thermal runaway of the battery. |