Anti-freezing heat-resistant hydrogel electrolyte for electrochromic device

A technology of electrochromic devices and gel electrolytes, applied in the fields of instruments, optics, nonlinear optics, etc., can solve the problems of no electrochromic research cases, reduced device performance, etc., and achieve excellent electrochromic performance and morphology characteristics. The effect of high and good application prospects

Active Publication Date: 2021-03-19
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still no relevant electrochromic research cases reported
Furthermore, due to the existence of free water in the hydrogel, there is usually the possibility of freezing at low temperature and gasification and dehydration at high temperature, which greatly reduces the performance of the device.

Method used

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  • Anti-freezing heat-resistant hydrogel electrolyte for electrochromic device
  • Anti-freezing heat-resistant hydrogel electrolyte for electrochromic device
  • Anti-freezing heat-resistant hydrogel electrolyte for electrochromic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of hydrogel electrolyte:

[0027] Add 0.4g carboxylated chitosan and 20 μL photoinitiator 2-hydroxy-2-methyl-1-phenyl-1-propanone into 5mL of lithium bromide aqueous solution, stir until dissolved; weigh 0.8g of acrylamide and Add 0.04g of N,N-methylenebisacrylamide to the solution, and continue to stir for 2h; then add 0.06g of polyethylene glycol-1000 and stir until completely dissolved; finally add glycerol with a volume fraction of 50%, Obtain hydrogel solution after stirring for 30min;

[0028] (2) Preparation of electrodes:

[0029] The Prussian blue film was prepared by constant current deposition method, and 0.329g of K was weighed 3 Fe(CN) 6 , 0.162g of FeCl 3 , 1.491g of KCl and 1mol / L HCl were dissolved in 100mL deionized water to obtain an electrodeposition solution, which was deposited at a constant current of 50μA for 800s; a polyviologen film was prepared by a constant voltage deposition method, and 0.848g of BVBr was weighed 2 , 0.13...

Embodiment 2

[0033] (1) Preparation of hydrogel electrolyte:

[0034] Add 0.6 g of carboxylated chitosan and 30 μL of photoinitiator 2-hydroxy-2-methyl-1-phenyl-1-propanone into 5 mL of lithium chloride aqueous solution, stir until dissolved; weigh 1.2 g of propylene Add amide and 0.05g of N,N-methylenebisacrylamide to the solution, and continue to stir for 2h; then add 0.1g of polyethylene glycol-1000 and stir until completely dissolved; finally add glycerine with a volume fraction of 50% Alcohol, obtain hydrogel solution after stirring;

[0035] (2) The preparation method of the electrode and the electrochromic device is the same as that of Example 1.

Embodiment 3

[0037] (1) Preparation of hydrogel electrolyte:

[0038] Add 0.6 g of carboxylated chitosan and 20 μL of photoinitiator 2-hydroxy-2-methyl-1-phenyl-1-propanone into 5 mL of lithium tetrafluoroborate aqueous solution, stir until dissolved; weigh 1.2 g of Add acrylamide and 0.05g of N,N-methylenebisacrylamide to the solution, and continue to stir for 2 hours; then add 0.12g of polyethylene glycol-1000 and stir until completely dissolved; finally add propylene glycol with a volume fraction of 50%. Triol, stirred for 30min;

[0039] (2) The preparation method of the electrode and the electrochromic device is the same as that of Example 1.

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PUM

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Abstract

The invention relates to an anti-freezing heat-resistant hydrogel electrolyte for an electrochromic device. Deionized water is used as a solvent, carboxylated chitosan and acrylamide are used as mainmonomers, N, N-methylene bisacrylamide is used as a cross-linking agent, lithium salt is used as an electrolyte, polyethylene glycol and glycerol are used as additives, 2-hydroxy-2-methyl-1-phenyl- 1-acetone is used as a photoinitiator, free radical polymerization is carried out under irradiation of an ultraviolet lamp, and by adjusting the addition amount of polyethylene glycol and glycerol, thehydrogel electrolyte with good anti-freezing and heat-resisting properties is prepared. Furthermore, the hydrogel electrolyte is used for preparing a sandwich-structure electrochromic device, and thedevice has a wide working temperature range, shows good cycling stability in a temperature interval of -40-60 DEG C, and is suitable for preparing a flexible device. The novel hydrogel electrolyte provided by the invention is simple in preparation method, cheap and easily available in raw materials, high in ionic conductivity, high in transparency, high in stability and excellent in high and low temperature tolerance, and has a wide application prospect.

Description

technical field [0001] The invention relates to the preparation and application of a novel hydrogel electrolyte, in particular to the preparation of a freeze-resistant and heat-resistant carboxylated chitosan-modified polyacrylamide hydrogel electrolyte, which belongs to the technical field of electrochromism. Background technique [0002] The electrochromic phenomenon has received extensive attention since its discovery in 1969, and has potential applications in display and light radiation and transmission management. Under the background of advocating energy conservation and emission reduction, the application of electrochromic smart windows in energy-saving buildings has a broad prospect. Based on electrochemical redox, ion intercalation and other mechanisms, scientists have designed and developed a series of excellent electrochromic materials, showing excellent electrochromic performance. In addition, in order to obtain better device performance to meet the needs of pra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/56C08F222/38C08F2/48C08J3/075C08L51/02C08L71/02C08K5/053C08K3/16C08K3/38G02F1/1506
CPCC08F251/00C08F2/48C08J3/075G02F1/1508C08J2351/02C08J2471/02C08K5/053C08K3/16C08K3/38C08F220/56C08F222/385
Inventor 刘建李小薇
Owner NANJING FORESTRY UNIV
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