Preparation method of composite polymer electrolyte

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

Active Publication Date: 2018-04-20
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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  • Preparation method of composite polymer electrolyte

Examples

Experimental program
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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 a composite polymer electrolyte. The preparation method of the composite polymer electrolyte comprises the step of obtaining a composite polymer electrolyte through an ion conductive agent; and the preparation method of the ion conductive agent comprises the following steps: in an inert gas atmosphere, dissolving cuprous bromide powder and pentamethyl diethylenetriamine into a first organic solvent to prepare a catalyst solution; adding a monomer A such as N,N-Dimethylaminoethyl Methacrylate, a monomer B such as di(ethylene glycol) methyl ether methacrylate and a first initiator into the catalyst solution respectively, carrying out an atom transfer radical polymerization reaction at the temperature of 75 to 85 DEG C, and reacting for 10 to 60min to obtain a reaction product; adding excess cyclohexane into the reaction product to obtain a flocculent precipitate, and purifying the flocculent precipitate to obtain the ion conductive agent.According to the ion conductive agent, the amorphous region of the composite polymer electrolyte is added, the crystallization of the polymer matrix can be effectively inhibited, the glass transitiontemperature is reduced, and then the low-temperature ionic conductivity of the composite polymer electrolyte is strengthened.

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 Applications(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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