Gel polymer electrolyte doped with modified particles, preparation method and application thereof

Abstract

The invention discloses a gel polymer electrolyte doped with modified particles, a preparation method and application thereof in an electrochromic device. The preparation method comprises the following steps of: (1) dissolving a polymer matrix and a lithium salt in a mixed solution of a plasticizer and a solvent, and continuously stirring at 45-55 DEG C, the polymer matrix being one of polyvinylidene fluoride-hexafluoropropylene, polymethyl methacrylate and polyvinylidene fluoride, (2) adding modified inorganic powder into the solution obtained in the step (1), and continuously stirring for 1-3 hours to form viscous sol, the addition amount of the modified inorganic powder being 3wt%-25wt% based on the total mass of the polymer matrix and the lithium salt being 100%, the modified inorganicpowder being silicon dioxide or titanium dioxide, and the surface being coated with a PMMA layer, and (3) pouring the sol obtained in the step (2) into a mold, and drying at 55-65 DEG C to obtain thegel polymer electrolyte doped with the modified particles.

Description

technical field [0001] The invention relates to the technical field of electrochromism, in particular to a gel polymer electrolyte doped with modified particles and its preparation method and application. Background technique [0002] Electrochromic glass is composed of a transparent substrate such as glass and a light-adjusting material layer. Under the action of low voltage (2-5V), it can produce reversible adjustment of light transmittance and reflectance of functional glass. Electrochromic glass has the intelligent function of continuously changing color, adjustable visible light transmittance, and realizing continuous adjustment of transparency and opacity; in terms of use, it also has the characteristics of diversified operation modes and easy control; in terms of functions, it can improve the intensity of natural light, Anti-glare, anti-peeping and other functions, so it is widely used in building doors and windows, automobiles, advertising decoration, meeting rooms a...

AI Technical Summary

Problems solved by technology

Three: With the further development of lithium-ion batteries and small devices, traditional PEO-based polymer electrolytes cannot adapt to this fast pace, so people began to look for more novel and better-performing materials, including structural improvements to the original materials. Modification, etc.

[0006] Chinese patent CN109507840A discloses a preparation method of gel electrolyte, the main component is an electrolyte solution composed of ionic liquid and lithium salt, and then doped with hydrophilic silicon dioxide under the condition of nitrogen gas, the preparation process is complicated

[0007] Due to the large difference between the surface properties of inorganic nanoparticles and the polymer used as the matrix, when the inorganic nanoparticles in the intrinsic state are combined with the polymer, aggregation and segregation are very easy to occur, which makes the performance of the composite material decline, and occurs during the service process. Denaturation, causing performance deterioration or even disappearance

Therefore, the composite concentration of inorganic particles used in the prior art is all in a low range, and the effect of inorganic-organic composite is not fully exerted.

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