Alkaline polymer electrolyte film based on non-woven fabric carrier and preparation method thereof

Abstract

The invention relates to an alkaline polymer electrolyte film based on a non-woven fabric carrier and a preparation method thereof, wherein the alkaline polymer electrolyte film based on the non-wovenfabric carrier is obtained by impregnating the non-woven fabric into a film mixed solution and drying, and the film mixed solution is processed by the following raw materials in parts by weight: polyvinyl alcohol 100-160 parts, polylactic acid 10-30 parts, polyethylene oxide 10-30 parts, alkali 120-220 parts, a composite crosslinking agent 8-12 parts, a defoamer 0.5-1.0 part, a film-forming auxiliary agent 2.5-7.5 parts, an emulsifier 2-3 parts, and an adhesive 1.5-2.5 parts. The composite crosslinking agent is a mixture of pectin and nano silicon dioxide. The invention takes polyvinyl alcohol, polylactic acid and PEO polymer as main raw materials, and takes pectin and nano silicon dioxide as composite crosslinking agent to realize excellent mechanical performance and electrochemical performance of the electrolyte film.

Description

technical field [0001] The invention relates to an alkaline polymer electrolyte film based on a non-woven fabric carrier and a preparation method thereof, belonging to the technical field of polymer electrolyte film preparation. Background technique [0002] Zinc-nickel batteries have the advantages of high theoretical specific energy, high theoretical voltage, high specific power, wide operating temperature range, low cost, and no pollution. They have become one of the important candidates for the development of secondary batteries. Occupying the market, the main reason is that the zinc electrode is prone to deformation and dendrite problems during charging and discharging, which leads to its short service life. [0003] At present, zinc-nickel battery researchers have adopted many improvement methods for problems such as deformation, dendrites, and corrosion of zinc electrodes, including electrode and electrolyte additives, but with little success. The goal has begun to sh...

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Problems solved by technology

At present, the research on polymer electrolytes is mostly focused on the application of lithium-ion batteries. The polymer electrolytes studied mainly include PEO, PVA, PAA and other systems. This type of research is currently mainly concentrated in the laboratory stage, which is far from industrial production and There is still a certain distance to be applied, and the main problem is that the ionic conductivity is not high enough and high conductivity and good mechanical properties cannot be satisfied at the same time.