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Self-healing branched polyethylenediamine hydrogel microcapsule composite material, its preparation method and application

A technology of polyethylene diamine and composite materials, which is applied in the direction of secondary batteries, electrochemical generators, structural parts, etc., to achieve the effect of improving performance

Active Publication Date: 2021-09-24
中科南京绿色制造产业创新研究院 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: to provide a self-healing branched polyethylene diamine hydrogel microcapsule composite material to solve the problems involved in the background technology, and further provide a simple preparation method and application

Method used

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  • Self-healing branched polyethylenediamine hydrogel microcapsule composite material, its preparation method and application
  • Self-healing branched polyethylenediamine hydrogel microcapsule composite material, its preparation method and application
  • Self-healing branched polyethylenediamine hydrogel microcapsule composite material, its preparation method and application

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Embodiment 1

[0049] A preparation method of nano vanadium pentoxide self-healing microcapsule composite material, comprising the following steps:

[0050] 1) Dissolve 0.5 g of commercially available vanadium pentoxide in 20 mL of ethanol, stir and add an appropriate amount of hydrogen peroxide to adjust the pH to ≈1. After stirring evenly, the solution was transferred to a polytetrafluoroethylene liner and placed in an oven at 160°C for hydrothermal reaction. After the reaction, cool to room temperature, centrifuge and wash twice, dry in an oven at 50°C, and calcined to obtain the product nano-vanadium pentoxide;

[0051] 2) Dissolve 7.5 g of glucose in 30 mL of water, then transfer the solution to a polytetrafluoroethylene liner, conduct a hydrothermal reaction in an oven at 150 °C, cool to room temperature, and wash twice by centrifugation, then place the solution in an oven at 60 °C Medium dry. The dried samples were carbonized at 350 °C to obtain carbonaceous microspheres;

[0052] ...

Embodiment 2

[0057] A preparation method of nano vanadium pentoxide self-healing microcapsule composite material, comprising the following steps:

[0058] 1) Dissolve 0.4 g of commercially available vanadium pentoxide in 25 mL of ethanol, stir and add an appropriate amount of hydrogen peroxide to adjust the pH to 1. After stirring evenly, the solution was transferred to a polytetrafluoroethylene liner and placed in an oven at 150°C for hydrothermal reaction. After the reaction, cool to room temperature, centrifuge and wash 3 times, dry in an oven at 55°C, and calcinate to obtain the product nano-vanadium pentoxide;

[0059] 2) Dissolve 8.8 g of glucose in 35 mL of water, transfer the solution to a polytetrafluoroethylene liner, conduct hydrothermal reaction in an oven at 150 °C, cool to room temperature, and centrifuge twice for washing. Dry in oven. The dried samples were carbonized at 350 °C to obtain carbonaceous microspheres;

[0060] 3) Dissolve 0.5 g of branched polyethylene diami...

Embodiment 3

[0065] A preparation method of nano vanadium pentoxide self-healing microcapsule composite material, comprising the following steps:

[0066] 1) Dissolve 0.6 g of commercially available vanadium pentoxide in 35 mL of ethanol, stir and add an appropriate amount of hydrogen peroxide to adjust the pH ≈ 2. After stirring evenly, the solution was transferred to a polytetrafluoroethylene liner, and placed in an oven at 170°C for hydrothermal reaction. After the reaction, cool to room temperature, centrifuge and wash 5 times, dry in an oven at 70°C, and calcinate to obtain the product nano-vanadium pentoxide;

[0067] 2) Dissolve 8.5 g of glucose in 30 mL of water, transfer the solution to a polytetrafluoroethylene liner, conduct hydrothermal reaction in an oven at 150 °C, cool to room temperature, and centrifuge twice for washing. Dry in oven. The dried sample was carbonized at 500 °C to obtain carbonaceous microspheres;

[0068] 3) Dissolve 0.45 g of branched polyethylene diamin...

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Abstract

The invention discloses a self-healing branched polyethylene diamine hydrogel microcapsule composite material, its preparation method and application, and belongs to the technical field of new energy materials. Self-healing hydrogel microcapsules are formed by encapsulating carbonaceous microspheres and branched polyethylene diamine hydrogel with a trimethylolpropane ethoxylate triacrylate shell, and then combining nano-vanadium pentoxide with self-healing hydrogel The active composite material of the positive electrode of the magnesium ion battery is obtained by mixing the glue microcapsules. The invention can accurately heal the cracks of the positive plate of the magnesium ion battery after the hydrogel with self-healing function is released, and the conductive carbonaceous balls play a bridge role in the electrode cracks, effectively enhancing the electron transport channel and the electrode stability. As a result, the conductive carbonaceous spheres and the branched polyethylene diamine hydrogel have a synergistic effect, which can not only achieve electron conduction healing, but also ensure good stability after self-healing, thereby realizing the battery's rapid charge-discharge cycle. Super long life.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, in particular to a self-healing branched polyethylene diamine hydrogel microcapsule composite material, its preparation method and application. Background technique [0002] With the development of science and technology, the society's demand for energy storage is becoming more and more urgent. It is very important to develop energy storage materials with high capacity, easy storage, green environmental protection and low price. Therefore, research in the field of secondary batteries has been widely concerned. Lithium-ion batteries that are currently being studied in the field have the disadvantages of high raw material prices, small capacity, and unstable cycles, while lithium-sulfur batteries have ion shuttle effects, and polysulfides dissolve. , The performance of the battery is significantly reduced at a higher current density. In order to solve these problems, it is particularl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/60H01M4/62H01M10/054
CPCH01M4/362H01M4/583H01M4/602H01M4/625H01M10/054Y02E60/10
Inventor 刘金云胡超权张敏韩阗俐
Owner 中科南京绿色制造产业创新研究院
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