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Flexible electrolyte membrane with deformation self-adaptive self-healing and its preparation method and application

A flexible electrolyte and self-repairing technology, which is applied in the direction of composite electrolyte, electrolyte storage battery manufacturing, non-aqueous electrolyte storage battery, etc., can solve the problems of poor mechanical properties of electrolyte content, low battery energy density, large proportion of inactive substances, etc., to achieve Good self-healing, strong deformation adaptability and low cost

Active Publication Date: 2021-07-27
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 membrane with deformation self-adaptive self-healing and its preparation method and application
  • Flexible electrolyte membrane with deformation self-adaptive self-healing and its preparation method and application
  • Flexible electrolyte membrane with deformation self-adaptive self-healing and its preparation method and application

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 membrane with self-adaptive and self-repairing deformation and a preparation method thereof; The composition ratio of moisture-absorbing lithium salt, moisture-retaining component, wetting component and lithium salt is (1-3):(1-5):1:(4-6) according to the mass ratio of the solid content; It is made of hygroscopic lithium salt wrapped in a polymer three-dimensional network structure to absorb moisture in the air; the water content of the membrane is less than 4%, and the ion conductivity is higher than 1mS cm ‑1 , The stretch rate of deformation recovery is greater than 200%. The electrolyte membrane of the present invention is applied to the assembly of flexible thin-film secondary batteries, which meets the requirements of wearable electronic devices with strong deformation adaptability to flexible power sources, good self-repair, safety and environmental protection, and provides safe and durable for wearable smart devices. The flexible power supply technology; at the same time, the preparation process is simple, the cost is low, and it is 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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Patent Type & Authority Patents(China)
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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