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Flexible electrolyte film with deformation self-adaption and self-repairing functions and preparation method and application thereof

A flexible electrolyte and self-repairing technology, applied in the fields of composite electrolytes, electrolyte battery manufacturing, non-aqueous electrolyte batteries, etc., can solve the problems of poor mechanical properties of electrolyte content, low battery energy density, and large proportion of inactive substances. Good stretchable recovery performance, strong deformation adaptability, and low cost

Active Publication Date: 2020-07-28
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessively high electrolyte content (~90%) in this electrolyte has poor mechanical properties
The gel electrolyte prepared by the patent (CN106602137B) "Gel Electrolyte Membrane, Lithium-ion Battery and Its Preparation Method" has good mechanical strength, but the use of organic electrolyte requires an excessive proportion of inactive materials packaged in aluminum-plastic film, resulting in Battery energy density is low, etc.

Method used

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  • Flexible electrolyte film with deformation self-adaption and self-repairing functions and preparation method and application thereof
  • Flexible electrolyte film with deformation self-adaption and self-repairing functions and preparation method and application thereof
  • Flexible electrolyte film with deformation self-adaption and self-repairing functions and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of the flexible electrolyte membrane with deformation self-adaptive and self-healing described in this embodiment, its steps and process conditions are as follows:

[0032] Step 1: Configure the precursor solution

[0033] It is 5.5% poly n-butyl acrylate-silane copolymer elastic emulsion with deionized water preparation solid content, preparation solid content is 1% sodium carboxymethyl cellulose solution; Then the mass ratio by solid content is 2:3: Weigh poly(n-butyl acrylate-silane copolymer) elastic emulsion, sodium carboxymethyl cellulose solution, polyether F127 and LiFSI hygroscopic lithium salt in a container at a ratio of 1:5, stir magnetically for 12 hours, and wait for the components to mix uniformly Obtain the precursor solution for later use.

[0034] Step 2: Film Formation

[0035] The precursor solution obtained in step 1 was coated on the glass substrate by scraping, and then dried at 60°C, and then the electrolyte membrane was ...

Embodiment 2

[0040]The steps and process conditions of the preparation method of the flexible electrolyte membrane with deformation self-adaptive and self-healing described in this embodiment are as follows:

[0041] Step 1: Configure the precursor solution

[0042] Prepare a poly(n-butyl acrylate-silane) copolymer elastic emulsion with a solid content of 5.5% with deionized water, prepare a sodium carboxymethyl cellulose solution with a solid content of 3%; then press the solid content in a mass ratio of 3:5:1 : 4 Weigh poly n-butyl acrylate-silane copolymer elastic emulsion, sodium carboxymethyl cellulose solution, polyether F127 and hygroscopic lithium salt LiNO 3 In the container, stir magnetically for 12 hours, and obtain the precursor solution after the components are evenly mixed, and set aside.

[0043] Step 2: Same as Example 1

[0044] Step 3: Post-processing

[0045] Cut the white film obtained in step 2 into a rectangular sheet with a diameter of 35 mm in length and a width ...

Embodiment 3

[0048] The steps and process conditions of the preparation method of the flexible electrolyte membrane with deformation self-adaptive and self-healing described in this embodiment are as follows:

[0049] Step 1: Configure the precursor solution

[0050] Prepare a poly(n-butyl acrylate-silane) copolymer elastic emulsion with a solid content of 5.5% with deionized water, prepare a sodium carboxymethyl cellulose solution with a solid content of 2%; then press the solid content in a mass ratio of 2:3:1 : 6 Weigh poly n-butyl acrylate-silane copolymer elastic emulsion, sodium carboxymethyl cellulose solution, polyether F127 and easy moisture-absorbing lithium salt LiTFSI in a container, stir magnetically for 12 hours, and obtain after the components are mixed evenly Precursor solution, spare.

[0051] Step 2: Same as Example 1.

[0052] Step 3: Post-processing

[0053] The white film obtained in step 2 was cut into discs with a diameter of 16 mm according to the required requir...

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Abstract

The invention discloses a flexible electrolyte film with deformation self-adaption and self-repairing functions and a preparation method thereof. The flexible electrolyte film is composed of an elastic component, a moisturizing component, a wetting component and lithium salt easy to absorb moisture, wherein a mass ratio of the elastic component to the moisturizing component to the wetting component to the lithium salt easy to absorb moisture is (1-3): (1-5): 1: (4-6). The ion transmission medium is constructed by absorbing moisture in the air by a moisture-absorbing lithium salt wrapped by a polymer three-dimensional network structure, the water content of the film is lower than 4%, ionic conductivity is higher than 1 mS cm<-1>, and the recoverable stretching rate of deformation is largerthan 200%. The electrolyte film is applied to assembly of the flexible thin-film secondary battery, requirements of wearable electronic equipment for high deformation adaptability, good self-repairingperformance, safety, environmental protection and the like of a flexible power supply are met, and the safe and durable flexible power supply technology is provided for wearable intelligent equipment, and the preparation process is simple, low in cost and suitable for large-scale engineering.

Description

technical field [0001] The invention belongs to the field of chemical power sources, and specifically relates to a flexible electrolyte membrane with super deformation self-adaptability and self-repairing, specifically a flexible electrolyte membrane with deformation self-adaptive self-repair and its preparation method and application. Background technique [0002] In recent years, the concept of wearable devices has continued to be hot, but in smart application scenarios, flexible power supplies have seriously restricted the development of wearable electronic devices. This is because the current flexible power sources for wearable electronic devices are mainly thin-film lithium-ion batteries, which are just miniaturized and thin-filmed traditional lithium-ion batteries. It cannot meet the requirements of complex deformation such as repeated folding, stretching, and twisting during the use of flexible power supplies for wearable electronic devices, and it is easy to cause da...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/42H01M10/0525H01M10/058
CPCH01M10/0525H01M10/0565H01M10/058H01M10/4235H01M2300/0085H01M2300/0088Y02E60/10Y02P70/50
Inventor 钟海麦耀华李鑫李文涛
Owner JINAN UNIVERSITY
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