Self-healing hydrogel electrolyte film, and preparation method and application thereof

An electrolyte film and hydrogel technology, which is applied in the field of self-healing hydrogel electrolyte film and its preparation, can solve the problems of less cycles of fracture/repair, low mechanical properties of hydrogel electrolyte, and low energy, etc. Achieve good flexibility and repeatability, excellent self-healing properties, and high tensile properties

Active Publication Date: 2019-09-20
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical properties of polyvinyl alcohol-based hydrogel electrolytes are not high, neither intrinsic self-healing properties nor high tensile properties
[0003] At present, for hydrogel electrolytes, the self-healing function mainly relies on the introduction of dynamic non-covalent bonds. Commonly used dynamic non-covalent bonds as cross-linking points include hydrogen bonds and coordination bonds. However, using such dynamic non-covalent bonds The self-healing performance of hydrogel electrolytes obtained by covalent bonds as a cross-linking method tends to be poor, and the number of break / repair cycles is usually less
Moreover, compared with the covalent cross-linking method, due to the low energy of the dynamic non-covalent bond, it is easy to be destroyed as the main energy dissipation point under stretching conditions, which cannot meet the needs of large deformation of related devices.

Method used

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  • Self-healing hydrogel electrolyte film, and preparation method and application thereof
  • Self-healing hydrogel electrolyte film, and preparation method and application thereof
  • Self-healing hydrogel electrolyte film, and preparation method and application thereof

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preparation example Construction

[0028] To achieve the above purpose, the present invention provides a self-healing hydrogel electrolyte film and a preparation method thereof. The self-healing hydrogel electrolyte film of the present invention has broad application prospects in flexible electronic devices such as flexible stretchable supercapacitors.

[0029] The preparation method of the above-mentioned self-healing hydrogel electrolyte film comprises the following steps:

[0030] (1) Disperse [2-(methacryloyloxy)ethyl]dimethyl-(3-sulfonic acid propyl)ammonium hydroxide and methacrylic acid in deionized water, at 22~26°C at 200rpm Stir at a speed of / min~500rpm / min until a uniform and transparent solution A is obtained;

[0031] (2) Add a thermal initiator to solution A in step (1), and stir at a speed of 200 rpm / min to 500 rpm / min at 22 to 26 ° C until a uniform and transparent solution B is obtained;

[0032] (3) inject solution B in step (2) into glass molds with an interval of 500 μm to 1500 μm, and po...

Embodiment 1

[0035] Preparation of self-healing hydrogel electrolyte film

[0036] Step (1): Add 0.5g of [2-(methacryloyloxy)ethyl]dimethyl-(3-sulfonic acid propyl)ammonium hydroxide (DMAPS) monomer into 3ml of water;

[0037] Step (2): Add 2 g of methacrylic acid (AAc) into the solution in step 1, and stir at a speed of 200 rpm / min to 500 rpm / min for more than 10 min to obtain a uniform and transparent monomer aqueous solution.

[0038] Step (3): Add initiator 0.0126g ammonium persulfate to the mixed solution in step (2), and stir for 10 minutes.

[0039] Step (4): The mixed solution obtained in step (3) was injected into a glass mold with an interval of 1000 μm with a pipette gun, and polymerized at 60° C. for 6 hours to obtain a hydrogel.

[0040] Step (5): The hydrogel obtained in step (4) was swelled in 1M phosphoric acid aqueous solution for 24 hours until equilibrium, and a self-healing hydrogel electrolyte was obtained.

[0041] After the above steps, the self-healing polyelectro...

Embodiment 2

[0043] Preparation of self-healing hydrogel electrolyte film

[0044] Repeat Example 1 with the same steps, the difference is that in the step (5) by changing the phosphoric acid aqueous solution of different concentration to soak, obtain the hydrogel soaked with different concentration.

[0045] After the above steps, the modulus and volume of the hydrogel will change after soaking in different concentrations of phosphoric acid aqueous solution. As the concentration of phosphoric acid increases, the modulus of the hydrogel becomes larger and the stretchability becomes worse. ,like figure 1As shown, the stress-strain curves of the hydrogel soaked in different molar concentrations of phosphoric acid solutions, at 1M, the hydrogel can be stretched to 50 times the original, and the tensile modulus is 0.01MPa; when the concentration reaches 4M , the hydrogel can be stretched to 25 times the original, and the tensile modulus is 0.2MPa; when soaked in a low-concentration phosphoric...

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Abstract

The invention relates to a self-healing hydrogel electrolyte film, and a preparation method and an application thereof. The electrolyte film is prepared by copolymerization of [2-(methylacryloyloxy)ethyl]dimethyl-(3-sulfonic acid propyl)ammonium hydroxide and a methacrylic acid monomer. Compared with the prior art, the hydrogel electrolyte film disclosed by the invention not only has very high tensile strength, but also shows excellent repeatable self-healing performance. The hydrogel film is used as an electrolyte, and a wrinkled electrode is prepared on the surface of the hydrogel electrolyte film by a pre-stretching method; a flexible supercapacitor prepared from the hydrogel film has good tensile property (1,000%) and self-healing performance, and the healed supercapacitor shows the energy storage performance consistent with that of an original device. The high-tensile and self-healing supercapacitor is relatively simple in structure and preparation process, and has a wide application prospect in the field of flexible stretchable electronic devices.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials, and in particular relates to a self-healing hydrogel electrolyte film and its preparation method and application. Background technique [0002] In recent years, flexible and wearable electronic devices such as electronic skins, smart fabrics, and implanted medical devices have received extensive attention, so the demand for wearable flexible energy storage devices has also increased. Wearable flexible energy storage devices require related devices with excellent flexibility and stable electrochemical performance under deformation conditions. As a kind of energy storage device, supercapacitor has both high energy density and power density, and has excellent cycle stability and fast charge and discharge performance. Therefore, flexible supercapacitor devices are used in portable electronic products and flexible It has broad application prospects in the field of wearable electronic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/56C08L33/02C08K3/32C08J5/18C08J3/075
CPCC08J3/075C08J5/18C08J2333/14C08K2003/329H01G11/56Y02E60/13
Inventor 赖文勇牛坚陈雪慧李冠军黄维
Owner NANJING UNIV OF POSTS & TELECOMM
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