Composite solid-state polymer electrolyte membrane and method for preparing the same

Abstract

The application relates to the technical field of energy storage materials, and provides a composite solid-state polymer electrolyte film and a preparation method thereof. The electrolyte film takes a polymer as a matrix, lithium salt, sodium salt, nematic liquid crystal E7 and ferroelectric liquid crystal NF485 are added after being dissolved by a polar solvent, 3D printing slurry is prepared, layer-by-layer printing and heat pressing treatment are carried out, and a structure-controllable composite solid-state electrolyte film is obtained. E7 and NF485 cooperatively improve dielectric performance and ion transmission efficiency, and excellent ferroelectric and piezoelectric responses are given to the material. The 3D printing technology can accurately construct complex configurations such as three-dimensional grids and porous structures, the thickness and shape of the film can be accurately controlled by adjusting parameters such as printing path, layer height and filling density, and the demand for light and thin, individualization and rapid customization of flexible electronics and wearable devices can be met. The method does not need a mold, has high material utilization, flexible structure design and integrated forming, and has a good industrial application prospect.

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