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A kind of preparation method of composite polymer electrolyte

A composite polymer and electrolyte technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problem of low ionic conductivity, achieve the effects of lowering the glass transition temperature, enhancing low-temperature ionic conductivity, and inhibiting crystallization

Active Publication Date: 2019-12-06
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to improve the problem of low ionic conductivity of polymer electrolytes at low temperatures in the prior art, an embodiment of the present invention provides a method for preparing a composite polymer electrolyte

Method used

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  • A kind of preparation method of composite polymer electrolyte
  • A kind of preparation method of composite polymer electrolyte
  • A kind of preparation method of composite polymer electrolyte

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Effect test

Embodiment 1

[0032] An embodiment of the present invention provides a method for preparing a composite polymer electrolyte, comprising: preparing a composite polymer electrolyte by using an ion-conducting agent; the method for preparing the ion-conducting agent includes:

[0033]Accurately weigh 0.3956g of cuprous bromide and 0.9530g of pentamethyldiethylenetriamine (PMDETA) in the glove box and add them to the container. A catalyst solution was obtained. After adding 10ml of dimethylaminoethyl methacrylate (DMAEMA) and 10ml of di(ethylene glycol) methyl ether methacrylate (DEGMA) to the container, place the container in liquid nitrogen, and wait for the liquid in the container to freeze Finally, the air in the container is removed by vacuuming, and then an inert gas is introduced into the container, and the step of vacuuming and passing the inert gas is repeated 2 to 10 times, and the inert gas can be nitrogen. Add 314 μL of the first initiator methyl 2-chloropropionate (MCP) to the cont...

Embodiment 2

[0040] Accurately weigh 0.3956g cuprous bromide and 0.9530g pentamethyldiethylenetriamine (PMDETA) in the glove box and add in the container, take out the container and inject inert gas (nitrogen) after vacuumizing and deoxygenating. Under the condition, add the anhydrous first organic solvent tetrahydrofuran and fully stir and dissolve to obtain the catalyst solution. After adding 10ml of dimethylaminoethyl methacrylate (DMAEMA) and 10ml of di(ethylene glycol) methyl ether methacrylate (DEGMA) to the container, place the container in liquid nitrogen, and wait for the liquid in the container to freeze Finally, the air in the container is removed by vacuuming, and then an inert gas is introduced into the container, and the step of vacuuming and passing the inert gas is repeated 2 to 10 times, and the inert gas can be nitrogen. Add 308 μL of the first initiator 2-bromopropionate methyl ester (MBP) to the container with a microliter syringe and seal the bottle mouth. After the co...

Embodiment 3

[0045] An embodiment of the present invention provides a method for preparing a composite polymer electrolyte, comprising: preparing a composite polymer electrolyte by using an ion-conducting agent; the method for preparing the ion-conducting agent includes:

[0046] Accurately weigh 0.3956g of cuprous bromide and 0.9530g of pentamethyldiethylenetriamine (PMDETA) in the glove box and add them to the container. A catalyst solution was obtained. After adding 10ml of dimethylaminoethyl methacrylate (DMAEMA) and 10ml of di(ethylene glycol) methyl ether methacrylate (DEGMA) to the container, place the container in liquid nitrogen, and wait for the liquid in the container to freeze Finally, the air in the container is removed by vacuuming, and then an inert gas is introduced into the container, and the step of vacuuming and passing the inert gas is repeated 2 to 10 times, and the inert gas can be nitrogen. Add 366 μL of the first initiator 1-chloro-1-phenylethane (PECl) into the co...

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Abstract

The invention discloses a preparation method of composite polymer electrolyte. The preparation method of the composite polymer electrolyte includes: obtaining the composite polymer electrolyte through an ion-conducting agent; the preparation method of the ion-conducting agent includes: dissolving cuprous bromide powder and pentamethyldiethylenetriamine in an inert gas atmosphere Prepare catalyst solution in the first organic solvent; Monomer A dimethylaminoethyl methacrylate, monomer B di(ethylene glycol) methyl ether methacrylate and the first initiator are added to the catalyst solution respectively , and carry out atom transfer radical polymerization reaction at 75-85°C, and react for 10-60 minutes to obtain a reaction product; add excess cyclohexane to the reaction product to obtain a flocculent precipitate and purify to obtain an ion-conducting agent. The ion-conducting agent increases the amorphous region of the composite polymer electrolyte, can effectively inhibit the crystallization of the polymer matrix, thereby reducing the glass transition temperature, and then enhances the low-temperature ion conductivity of the composite polymer electrolyte.

Description

technical field [0001] The invention relates to the field of lithium ion battery materials, in particular to a preparation method of a composite polymer electrolyte. Background technique [0002] As a new type of energy storage battery, lithium-ion batteries have been mass-produced and used due to their high capacity and high energy density. However, accidents caused by the lack of thermal stability of the electrolyte in traditional lithium-ion batteries are endless. Polymer electrolytes are fundamentally It solves the leakage and safety problems of traditional lithium-ion batteries, and becomes an ideal material for manufacturing lithium-ion secondary batteries. Polymer electrolytes are the core components of lithium-ion batteries, and their systems generally contain polymer matrix, lithium salts, and other additives. High-performance polymer electrolytes need to have high ionic conductivity, suitable mechanical strength, stable membrane structure, and chemical and electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565Y02E60/10
Inventor 何丹付成周瑞雪尤庆亮
Owner JIANGHAN UNIVERSITY
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