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A self-healing hydrogel polyelectrolyte and preparation and application thereof

A polyelectrolyte, hydrogel technology, applied in the direction of hybrid capacitor electrolyte, etc., can solve the problem of few flexible supercapacitors, achieve excellent self-healing performance, good flexibility and repeatability, and improve capacitance.

Active Publication Date: 2019-01-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently, there are few reports on novel hydrogel polyelectrolytes for self-healing and stretchable flexible supercapacitors.

Method used

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  • A self-healing hydrogel polyelectrolyte and preparation and application thereof
  • A self-healing hydrogel polyelectrolyte and preparation and application thereof
  • A self-healing hydrogel polyelectrolyte and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A hydrogel polyelectrolyte with self-healing and stretchable properties and a preparation method for its application in flexible supercapacitors, the specific steps are:

[0034] Step 1: Take 0.38g of 2.5wt% graphene oxide and disperse it in 7.8ml of deionized water, keep stirring for 16 minutes, and then sonicate for 40 minutes.

[0035] Step 2: Add 0.2 g of lithium diatomaceous earth to the graphene oxide dispersion in step 1, and keep stirring for 20 minutes.

[0036] Step 3: Add 0.42g of 2-acrylamide-2-methylpropanesulfonic acid as a monomer and 1.3ml of N,N-dimethylacrylamide as a monomer to the mixture in Step 2 in sequence, and stir for 20 minutes respectively.

[0037] Step 4: Add 0.015 g of potassium persulfate as an initiator and stir for 10 minutes. Finally, 8 μL of the catalyst was added and mixed for 8 minutes.

[0038] Step 5: Place the copolymer obtained in step 4 at room temperature for 18 hours to obtain a double nanocomposite hydrogel.

[0039] Step...

Embodiment 2

[0044] A hydrogel polyelectrolyte with self-healing and stretchable properties and a preparation method for its application in flexible supercapacitors, the specific steps are:

[0045] Step 1: Take 0.4g of 2.5wt% graphene oxide and disperse it in 7.8ml of deionized water, keep stirring for 10 minutes, and then sonicate for 20 minutes.

[0046] Step 2: Add 0.2 g of lithium diatomaceous earth to the graphene oxide dispersion in step 1, and keep stirring for 20 minutes.

[0047] Step 3: Add 0.4 g of 2-acrylamide-2-methylpropanesulfonic acid as a monomer and 0.8 ml of N,N-dimethylacrylamide as a monomer to the mixture in Step 2 in sequence, and stir for 30 minutes respectively.

[0048] Step 4: Add 0.02 g of potassium persulfate as an initiator and stir for 20 minutes. Finally, 13 μL of the catalyst was added and stirred for 10 minutes.

[0049] Step 5: Place the copolymer obtained in Step 4 at room temperature for 15 hours to obtain a double nanocomposite hydrogel.

[0050] S...

Embodiment 3

[0054] A hydrogel polyelectrolyte with self-healing and stretchable properties and a preparation method for its application in flexible supercapacitors, the specific steps are:

[0055] Step 1: Take 0.32g of 2.5wt% graphene oxide and disperse it in 7.8ml of deionized water, keep stirring for 20 minutes, and then sonicate for 30 minutes.

[0056] Step 2: Add 0.16 g of lithium diatomaceous earth to the graphene oxide dispersion in step 1, and keep stirring for 15 minutes.

[0057] Step 3: 0.38 g of 2-acrylamide-2-methylpropanesulfonic acid as a monomer and 1.05 mol of N,N-dimethylacrylamide as a monomer were sequentially added to the mixture in Step 2, and stirred for 15 minutes respectively.

[0058] Step 4: Then add 0.01 g of potassium persulfate as an initiator and stir for 15 minutes. Finally, 10 μL of the catalyst was added and stirred for 5 minutes.

[0059] Step 5: Place the copolymer obtained in step 4 at room temperature for 24 hours to obtain a double nanocomposite h...

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Abstract

The invention relates to a self-healing hydrogel polyelectrolyte and preparation and application thereof. The polyelectrolyteis is prepared by copolymerizing-2-acrylamide-2-methylpropane sulfonic acidand N, a nN-dimethyl acrylamide monomer, and the lithium celite and graphene oxide are prepared by double crosslinkers. . Compared with the prior art, the present invention not only has higher tensile strength, but also exhibits excellent and repeatable self-healing performance under heating or infrared light irradiation. the hydrogel is used as both an electra olyte and diaphragm, a wrinkled electrode is fabricated by pre-stretching method. The supercapacitor has super stretchability (1000%) and excellent self-healing performance. Moreover, the healing supercapacitor still maintains about 900% stretchability. The self-healing and high tensile supercapacitor in the invention has simple structure and preparation process, and has wide application prospect in portable flexible and wearable devices.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a self-healing hydrogel polyelectrolyte and its preparation and application. Background technique [0002] In recent years, flexible and wearable electronic products with intelligent self-healing and stretch resistance have attracted widespread attention. In order to better meet the energy requirements of the above-mentioned electronic products, it is urgent to develop matching self-healing, anti- Energy storage devices that are destroyed by mechanical forces. Due to their high power density, long cycle life, and simple fabrication process, flexible supercapacitors with self-healing or stretchable properties have been intensively studied by designing novel structural electrode materials and electrolytes. Although some stretchable supercapacitors with self-healing properties have been reported, their self-healing performance is often poor, and the number of fracture / repai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/56C08F220/58C08F220/54C08K3/04C08K3/34
CPCC08F220/54C08F220/58C08F220/585C08K3/042C08K3/34H01G11/56C08F220/285Y02E60/13
Inventor 陈涛李惠丽
Owner TONGJI UNIV
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