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Preparation method of peo-based hypercrosslinked molecular gel composite electrolyte membrane

A technology of composite electrolyte membrane and molecular gel, which is applied in the field of preparation of hypercrosslinked molecular gel composite electrolyte membrane, can solve the problems that the mechanical properties cannot meet the requirements of commercialization, and achieve enhanced mechanical properties, high ionic conductivity, and low cost effect

Active Publication Date: 2019-11-05
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, research at this stage shows that gel polymer electrolytes still have some technical bottlenecks that have not yet been broken through, mainly reflected in the fact that the commonly used gel polymer electrolytes, including PEO, have lower ionic conductivity at room temperature than liquid electrolytes. At the same time, the mechanical properties of the PEO electrolyte membrane without special treatment (such as cross-linking, doping, etc.) still cannot meet the commercial requirements

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  • Preparation method of peo-based hypercrosslinked molecular gel composite electrolyte membrane
  • Preparation method of peo-based hypercrosslinked molecular gel composite electrolyte membrane
  • Preparation method of peo-based hypercrosslinked molecular gel composite electrolyte membrane

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Embodiment 1

[0037] The preparation method of the PEO-based hypercrosslinked molecular gel composite electrolyte membrane of the present invention comprises the following steps:

[0038] (1) Weigh 1.2g of distilled water into the reaction vessel, then weigh 0.5g of 1,8-octanediamine into the reaction vessel, stir to dissolve it, and then add 2.50g of polyethylene glycol to the reaction vessel Alcohol diglycidyl ether, while the magnet is put into the reaction vessel, the mixture system is placed on a magnetic stirrer with a rotation speed of 25r / min and stirred for 20min to obtain a clear night;

[0039] (2) Coating the stirred clear liquid on the film coating machine, the film coating speed is 14mm / s, and the scraper accuracy is 0.01mm to obtain the coating film;

[0040] (3) Put the coating film into an oven and bake it at 70° C. for 2 hours to obtain the PEO-based hypercrosslinked molecular gel electrolyte membrane.

Embodiment 2

[0042] The preparation method of the PEO-based hypercrosslinked molecular gel composite electrolyte membrane of the present invention comprises the following steps:

[0043] (1) Weigh 1.2g of distilled water into the reaction vessel, then weigh 0.5g of 1,8-octanediamine into the reaction vessel, stir to dissolve it, and then add 2.94g of polyethylene glycol into the reaction vessel Alcohol diglycidyl ether, while the magnet is put into the reaction vessel, the mixture system is placed on a magnetic stirrer with a rotating speed of 35r / min and stirred for 20min to obtain a clear night;

[0044] (2) Coating the stirred clear liquid on the coating machine, the coating speed is 18mm / s, and the scraper accuracy is 3.5mm to obtain the coating;

[0045] (3) Put the coating film into an oven and bake it at 75° C. for 3 hours to obtain the PEO-based hypercrosslinked molecular gel electrolyte membrane.

[0046] Depend on figure 2 -c shows that the infrared spectrum of polyethylene gl...

Embodiment 3

[0049] The preparation method of the PEO-based hypercrosslinked molecular gel composite electrolyte membrane of the present invention comprises the following steps:

[0050] (1) Weigh 1.2g of distilled water into the reaction vessel, then weigh 0.5g of 1,8-octanediamine into the reaction vessel, stir to dissolve it, and then add 3.33g of polyethylene glycol into the reaction vessel Alcohol diglycidyl ether, put the magnet into the reaction vessel at the same time, put the mixture system in a magnetic stirrer with a rotating speed of 30r / min and stir for 20min to obtain clear night;

[0051] (2) Coating the stirred clear liquid on the coating machine, the coating speed is 18mm / s, and the scraper accuracy is 3.5mm to obtain the coating;

[0052] (3) Put the coating film into an oven and bake it at 70° C. for 2 hours to obtain the PEO-based hypercrosslinked molecular gel electrolyte membrane.

[0053] Depend on Figure 5 -a It can be seen that when the content of the curing age...

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Abstract

The invention discloses a method for preparing a PEO-based hypercrosslinked molecular gel composite electrolyte membrane. The method comprises the following steps: first dissolving a water-soluble polyamine curing agent in water, then adding glycidyl ether and stirring sufficiently to obtain The supernatant liquid is coated on a film coating machine, and finally dried to obtain a PEO-based hypercrosslinked molecular gel electrolyte membrane. The present invention prepares a polymer electrolyte with a super-crosslinked structure by adding a water-soluble polyamine curing agent and reacting with glycidyl ether. While enhancing the mechanical properties of the electrolyte membrane, its ionic conductivity is improved so that it can meet In the preparation of lithium-ion devices, there are requirements for the flexibility, ease of processing, and high ion conductivity of the electrolyte system.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a method for preparing a PEO-based hypercrosslinked molecular gel composite electrolyte membrane. Background technique [0002] At present, large-scale commercial lithium-ion batteries mainly use various carbonate compounds and their derivatives dissolved in inorganic lithium salts as liquid electrolytes. Chemical stability window. However, the safety limitations of liquid electrolytes, which are easy to leak and flammable, greatly limit its further application, and at the same time, it cannot meet the requirements of the development of electronic products towards flexibility and miniaturization. Therefore, people turn their research direction to other electrolyte materials, such as gel electrolyte, which is one of the hottest research hotspots at present. Generally speaking, gel polymer electrolytes are not easy to leak and burn, and have advantages such as good safety perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M10/0565
CPCH01M10/0565H01M10/058H01M2300/0082Y02E60/10Y02P70/50
Inventor 兰倩赵金星程琦刘畅汤舜梁济元曹元成
Owner JIANGHAN UNIVERSITY