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

An ion gel, light curing technology, applied in the direction of solid electrolyte, non-aqueous electrolyte, hybrid capacitor electrolyte, etc., can solve the problems of single function, difficult sealing, environmental pollution, etc., to avoid environmental pollution, avoid air bubbles, and simple operation. Effect

Pending Publication Date: 2021-12-10
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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preparation example Construction

[0039] In order to solve the above technical problems, the first aspect of the present invention provides a method for preparing a photocurable temperature-induced phase change ion gel electrolyte, comprising the following steps:

[0040] (1) Synthesis of polymer monomer: mix polymer and diisocyanate, add catalyst, heat to 70-90°C in nitrogen atmosphere for 1-2.5h, then drop to 40-60°C and add acrylic acid monomer, react After 1-2 hours, the reaction is terminated, and the polymer monomer is obtained;

[0041] (2) Preparation of photocurable temperature-induced phase change ionic gel electrolyte: mix polymer monomer with bistrifluoromethanesulfonimide salt, add photoinitiator, mix well, inject into mold, and irradiate with ultraviolet light for 30s ~10min to prepare photocurable temperature-induced phase change ion gel electrolyte.

[0042] In one embodiment, the molar ratio of the polymer to the diisocyanate is 1:(1-2).

[0043] In one embodiment, the molar ratio of the pol...

Embodiment 1

[0075]Synthesis of Polymer Monomer-1: Mix PPG-4000 (CAS No.: 25322-69-4) with a molecular weight of 4000 and isophorone diisocyanate (CAS No.: 4098-71-9), add dilauric acid Dibutyltin (CAS No.: 77-58-7) was heated to 80°C for 1.5 hours in a nitrogen atmosphere and then lowered to 50°C. Add hydroxyethyl methacrylate (CAS No.: 868-77-9) and react for 1 hour to terminate Reaction to obtain polymer monomer-1; the molar ratio of PPG-4000 to isophorone diisocyanate is 1:1.3; the molar ratio of PPG-4000 to hydroxyethyl methacrylate is 1:1.3; dilauric acid The weight of dibutyltin is 1% of the total weight of PPG-4000 and isophorone diisocyanate;

[0076] Preparation of photocurable temperature-induced phase change ion gel electrolyte-1: polymer monomer-1 and 1-ethyl-3-methylimidazole bistrifluoromethanesulfonimide salt (CAS number: 174899-82- 2) After mixing, add 2-hydroxy-2-methylpropiophenone (CAS No.: 7473-98-5) and mix well, then pour into the double-layer transparent glass, irr...

Embodiment 2

[0080] Synthesis of Polymer Monomer-2: Mix PPG-4000 with a molecular weight of 4000 and isophorone diisocyanate, add dibutyltin dilaurate, heat to 80°C for 1.5h in a nitrogen atmosphere, then drop to 50°C and add After reacting hydroxyethyl methacrylate for 1 hour, the reaction was terminated, and the polymer monomer-2 was obtained; the molar ratio of PPG-4000 and isophorone diisocyanate was 1:1.8; the molar ratio of PPG-4000 and hydroxyethyl methacrylate The molar ratio is 1:1.8; the weight of dibutyltin laurate is 1% of the total weight of PPG-4000 and isophorone diisocyanate;

[0081] Preparation of photocurable temperature-induced phase change ionic gel electrolyte-2: mix polymer monomer-2 with 1-ethyl-3-methylimidazole bistrifluoromethanesulfonimide salt and add 2-hydroxyl-2 - Methylpropiophenone is mixed evenly and poured into double-layer transparent glass, and after being irradiated by ultraviolet light for 5 minutes, the double-layer transparent glass is disassembled ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/28C08L75/14C08K5/435C08G18/67C08G18/48H01M10/0565H01G11/56G02F1/00G02F1/01
CPCC08J3/28C08G18/672C08G18/4825H01M10/0565H01G11/56G02F1/0147G02F1/009C08J2375/14C08K5/435H01M2300/0082Y02E60/10
Inventor 王密张嘉恒吴昊李林衡
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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