Composite plastic crystal polymer electrolyte material and preparation method thereof

Abstract

The invention relates to a composite plastic crystal polymer electrolyte material and a preparation method thereof. The invention belongs to the technical field of electrolyte materials. The invention is characterized in that the composite plastic crystal polymer electrolyte material is composed of a polymer matrix, a lithium salt, inorganic nanoparticles and a plastic crystal material. The mixed solution of the polymer matrix, lithium salt, inorganic nanoparticles and plastic crystal material are made into a plastic crystal polymer electrolyte film. The preparation method of the composite plastic crystal polymer electrolyte comprises the following steps: dissolving the polymer matrix, lithium salt, inorganic nanoparticles and plastic crystal material in a solvent, uniformly mixing, pouring the solution into a polytetrafluoroethylene mold, heating to volatilize the solvent, and drying to obtain the polymer electrolyte film. The composite plastic crystal polymer electrolyte material has the advantages of simple preparation technique, favorable heat stability, wide chemical stability window, favorable mechanical strength, high ionic conductivity and the like.

Description

Technical field [0001] The invention belongs to the technical field of electrolyte materials, and particularly relates to a composite plastic crystal polymer electrolyte material and a preparation method thereof. Background technique [0002] At present, most of the lithium-ion batteries on the market use liquid organic electrolyte as the electrolyte, which has disadvantages such as leakage, poor cycle stability, uncontrollable size, and poor thermal stability. Replacing the traditional organic electrolyte with a polymer electrolyte can not only avoid leakage of the electrolyte, but also the shape of the polymer electrolyte is controllable, which is convenient for carrying and processing. As an ideal solid electrolyte for lithium-ion batteries, in addition to higher electrical conductivity, it also requires good film-forming properties and mechanical properties. For the current all-solid polymer electrolyte, the more common PEO system is the PEO system. Although it overcomes the...

AI Technical Summary

Problems solved by technology

However, due to the adsorption of a large amount of electrolyte, the mechanical properties of polymer electrolyte membranes are greatly reduced, and the original advantages of solid electrolytes are lost.