Solid polymer electrolyte membrane and preparation method thereof

A technology of solid polymer and electrolyte membrane, which is applied in the direction of electrolyte, non-aqueous electrolyte battery, electrolyte immobilization/gelation, etc. It can solve the problems of low mechanical strength, weak chain segment movement ability, low melting point, etc., and achieve the improvement of mechanical Performance and heat resistance, improvement of ion conductivity, effect of high ion conductivity

Pending Publication Date: 2022-06-24
佛山(华南)新材料研究院
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of organic solvents in the preparation of the above-mentioned polymer electrolyte membranes pollutes the environment, is harmful to the human body, the process is complicated, and the production efficiency is not high.
The prepared electrolyte membrane has poor mechanical strength, poor heat resistance and low ion conductivity
There are many reasons for the above problems. Among them, because the polymer can be mixed with lithium salt and inorganic oxide evenly after it is dissolved, it is necessary to add a large amount of organic solvent to dissolve the polymer, which will cause harm to the human body and the environment.
Due to the low mechanical strength and low melting point of the polymer matrix, the resulting polymer electrolyte membrane has poor heat resistance
Because the polymer is in a solid structure, the chain segment movement ability is weak, and finally the ion conductivity of the polymer electrolyte membrane is not high.

Method used

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  • Solid polymer electrolyte membrane and preparation method thereof

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preparation example Construction

[0045] Correspondingly, the present invention also provides a method for preparing the above-mentioned solid polymer electrolyte membrane, comprising the following steps:

[0046] S1, in parts by weight, combine 800-1200 parts of rubber materials, 800-1200 parts of operating aids, 400-600 parts of fillers, 400-600 parts of lithium salts, 0.1-3 parts of ZnO, 0.01-0.5 parts of stearic acid, 0.1-3 parts of vulcanizing agent and 2-8 parts of accelerator are mixed to obtain a first mixture; the vulcanizing agent includes sulfur and / or sulfur donor.

[0047] Preferably, the rubber material is selected from one or a combination of natural rubber, styrene-butadiene rubber, butyl rubber, nitrile rubber, neoprene rubber, and EPDM;

[0048] Described operation aid includes operation oil or plasticizer; Specifically, described operation aid selects dioctyl phthalate, dimethyl phthalate, diethyl phthalate, phthalic acid One or a combination of di-n-butyl ester, paraffin oil, naphthenic oi...

Embodiment 1

[0061] This embodiment provides a preparation method of a solid polymer electrolyte membrane:

[0062] S1. Mix 1000g EPDM, 0.5g ZnO, 0.1g stearic acid, 500g Al 2 O 3 , 1000g of paraffin oil, 500g of LiTFSI, 1g of thiuram compound and 6g of aldehyde amine accelerator are mixed into the agent to obtain the first mixture;

[0063] S2, put the first mixture into the Banbury mixing equipment, carry out Banbury mixing under the condition of 80 ℃, obtain the mixed rubber;

[0064] S3. Add the mixed rubber to a pair of roll mills, adjust the temperature of the opposite rolls to 80°C, and calender the mixed rubber into a film to obtain a mixed rubber film; the mixed rubber film is kept at 150° C. The finished product is obtained after 5 minutes.

Embodiment 2

[0066] This embodiment provides a preparation method of a solid polymer electrolyte membrane:

[0067] S1. Mix 1000g EPDM, 0.5g ZnO, 0.1g stearic acid, 500g Al 2 O 3 , 1000g paraffin oil, 500g LiTFSI, 2g thiuram compound and 6g aldehyde amine accelerator are mixed into the agent to obtain the first mixture;

[0068] S2, put the first mixture into the Banbury mixing equipment, carry out Banbury mixing under the condition of 80 ℃, obtain the mixed rubber;

[0069] S3. Add the mixed rubber to a pair of roll mills, adjust the temperature of the opposite rolls to 80°C, and calender the mixed rubber into a film to obtain a mixed rubber film; the mixed rubber film is kept at 150° C. The finished product is obtained after 5 minutes.

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Abstract

The solid polymer electrolyte membrane is prepared from the following components in parts by weight: 800 to 1200 parts of a rubber material, 800 to 1200 parts of an operation aid, 400 to 600 parts of filler, 400 to 600 parts of lithium salt, 0.1 to 3 parts of ZnO, 0.01 to 0.5 part of stearic acid, 0.1 to 3 parts of a vulcanizing agent and 2 to 8 parts of an accelerant, the vulcanizing agent comprises sulfur and/or a sulfur donor. Correspondingly, the invention also provides a preparation method of the solid polymer electrolyte membrane, and the solid polymer electrolyte membrane is high in mechanical strength, good in heat resistance and high in ionic conductivity.

Description

technical field [0001] The invention relates to the technical field of solid polymer electrolyte membranes, in particular to a solid polymer electrolyte membrane and a preparation method thereof. Background technique [0002] In order to meet the growing demand for lithium batteries in consumer electronics and electric vehicles, all-solid-state lithium batteries have attracted widespread attention in recent years due to their superior safety and ultra-high energy density. Traditional lithium batteries containing organic liquid electrolytes exhibit serious safety problems with toxicity, flammability, corrosion, and poor chemical stability. The use of solid electrolytes instead of electrolytes and separators can fundamentally eliminate the above-mentioned safety problems. All-solid-state lithium batteries are divided into three categories according to the type of solid-state electrolyte: polymers, oxides and sulfides. The polymer all-solid-state battery is the closest to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M10/056
CPCH01M10/056H01M10/052H01M2300/0085H01M2300/0091
Inventor 刘亭杨文科徐亚辉
Owner 佛山(华南)新材料研究院
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