Preparation method and application of photocuring temperature-induced phase change ionic gel electrolyte

Abstract

The invention relates to the field of multi-functional electrolyte materials and devices, in particular to a preparation method and application of a photocuring temperature-induced phase change ionic gel electrolyte. The preparation method of the photocuring temperature-induced phase change ionic gel electrolyte comprises the following steps of: (1) synthesis of a polymer monomer: mixing a polymer and diisocyanate, adding a catalyst, heating to 70-90 DEG C in a nitrogen atmosphere, reacting for 1-2.5 h, cooling to 40-60 DEG C, adding an acrylic monomer, reacting for 1-2 h, and terminating the reaction to obtain the polymer monomer; and (2) preparation of the photo-curing temperature-induced phase change ionic gel electrolyte: mixing the polymer monomer and the bis (trifluoromethanesulfonyl) imide salt, adding a photoinitiator, mixing well, injecting the mixture into a mold, and performing ultraviolet irradiation for 30 seconds to 10 minutes to obtain the photocuring temperature-induced phase change ionic gel electrolyte. The prepared photocuring temperature-induced phase change ionic gel electrolyte can be applied to overheating protection of thermochromic devices, thermoelectric dual-response devices and energy storage devices.

Description

technical field [0001] The invention relates to the field of multifunctional electrolyte materials and devices, in particular to a preparation method and application of a photocurable temperature-induced phase change ion gel electrolyte. Background technique [0002] Electrolytes are the vehicles for ion transport in electrochemical devices such as batteries, but since their commercialization, very little tuning has been done on them, which has greatly limited the improvement of electrochemical device performance. With the advancement of science and technology, modern materials continue to develop in the direction of high performance and multifunctionality. Among them, stimuli-responsive materials with intelligent properties have become an important research direction in the field of new materials. Stimuli-responsive materials can sense external environmental stimuli (such as: light, electricity, heat, magnetism, gas, pH value, etc.), change their own structure and physical...

AI Technical Summary

Problems solved by technology

However, thermochromic hydrogels have inherent disadvantages: water freezing or evaporation, severe shrinkage, liquid drainage during phase separation, and poor mechanical strength. Therefore, there are problems such as poor reversible cycle stability and difficult sealing, making it difficult for large-scale practical applications.

However, the ion gel does not involve electrochemical performance, and its preparation method takes a long time to polymerize, and a large amount of solvent will volatilize during the curing process, polluting the environment

Patent CN1934212B discloses a gel polymer electrolyte including ionic liquid, the gel polymer in the electrolyte is formed by the following steps: injecting ionic liquid and gel polymer through polymerization reaction between two electrodes of an electrochromic device The electrolyte monomer precursor solution of the condensed polymer, and then in situ polymerization reaction inside the electrode, but this electrolyte still belongs to the research field of traditional electrolytes, which are only used to provide the ion channels required for electrochemical reactions, while blocking the gap between electrodes Short circuit, single function and lack of intelligence, no stimulus response phenomenon

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