Preparation method of fluoro-compound gel polymer electrolyte membrane and lithium ion battery

A gel polymer and electrolyte membrane technology, applied in the field of lithium-ion batteries, can solve the problems of unsuitable industrial application, low conductivity, limited effect, etc., to improve room temperature ion conductivity, high liquid absorption rate, and good affinity Effect

Active Publication Date: 2019-03-22
ZHUHAI COSMX BATTERY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Fluorine-containing polymers have always been the main material in lithium-ion batteries. The Chinese invention patent application with the publication number CN201710181998.3 discloses a single-ion polymer electrolyte formed by copolymerization of sodium styrene sulfonate and fluorine-containing acrylate, although Lithium ion migration number is high, but the electrical conductivity is too low for industrial application
The Chinese invention patent application with the application number CN 201610487646.6 discloses a multi-polymerization of sodium styrene sulfonate, polyethylene glycol methacrylate, hexafluorobutyl methacrylate, and ethylene carbonate. Introduce a strong electron-withdrawing perfluoroalkyl group at the molecular level. This structure can promote the ionization of lithium ions to a certain extent and improve the mechanical properties of the electrolyte membrane, but the effect is limited.
According to current patents and literature reports, although individual performance is outstanding, there is still a certain distance from industrial application

Method used

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  • Preparation method of fluoro-compound gel polymer electrolyte membrane and lithium ion battery
  • Preparation method of fluoro-compound gel polymer electrolyte membrane and lithium ion battery
  • Preparation method of fluoro-compound gel polymer electrolyte membrane and lithium ion battery

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specific Embodiment approach 1

[0031] The fluoropolymer gel polymer electrolyte membrane described in this embodiment is a copolymer electrolyte membrane of a gelable monomer and a fluorine-containing vinyl monomer, and the preparation method includes the following steps:

[0032] Step 1: In parts by weight, add 5-50 parts of fluorine-containing vinyl monomers, 40-80 parts of gelable monomers, and 0-10 parts of polyethylene glycol methacrylate-based monomers into 100-300 parts of In the solvent, keep nitrogen or inert gas atmosphere, stir at 100~800r / min speed for 10min-120min, then add 0.05~1.00 parts of initiator, then react at 60℃~110℃ for 5~48h, and obtain after purification treatment polymer A;

[0033] Step 2: In parts by weight, add 30-80 parts of polymer A and 0-20 parts of fillers into 100-300 parts of solvent, under dry nitrogen or inert gas atmosphere, stir at a rotational speed of 100-800 r / min, and stir. 1~10h, then add 0~2.00 parts of hydroxyl cross-linking agent into the mixing system, the m...

Embodiment 1

[0046] A fluoropolymer gel polymer electrolyte membrane is a copolymer electrolyte membrane of a gelable monomer and a fluorine-containing vinyl monomer, and its preparation method comprises the following steps:

[0047] Step 1: In parts by weight, 3 parts containing 1H, 1H, 2H-perfluoro-1-hexene, 2 parts octafluoropentyl methacrylate, 50 parts polyethylene glycol methyl ether acrylate, 30 parts Methyl methacrylate, 2 parts of polyethylene glycol methyl methacrylate with a molecular weight of 300, and 1 part of polyethylene glycol monoallyl ether with a molecular weight of 2400 were added to 100 parts of toluene, and nitrogen was continuously passed through at 800 r / Stir for 10 min at a rotating speed of 1 min, then add 1.00 parts of azobisisobutyronitrile, and then react at 60°C for 48 h. After purification, polymer A is obtained;

[0048] Step 2: In parts by weight, add 80 parts of polymer A, 8 parts of nano-silicon dioxide, 8 parts of lithium titanate, and 4 parts of lithi...

Embodiment 2

[0052] A fluoropolymer gel polymer electrolyte membrane is a copolymer electrolyte membrane of a gelable monomer and a fluorine-containing vinyl monomer, and its preparation method comprises the following steps:

[0053] Step 1: In parts by weight, 20 parts containing 4,4,5,6,6,6-octafluoro-2-hexene, 30 parts of hexafluorobutyl methacrylate, 30 parts of isobutyl methacrylate ester, 10 parts of polyethylene glycol methyl ether methacrylate, 1 part of polyethylene glycol methyl methacrylate with a molecular weight of 2500, 5 parts of polyethylene glycol monoallyl ether with a molecular weight of 100, and added 300 parts of benzene , continue to pass argon, stir at 100r / min for 120min, then add 0.05 part of benzoyl peroxide, then react at 110°C for 36h, and obtain polymer A after purification;

[0054] Step 2: In parts by weight, add 30 parts of polymer A, 5 parts of nano aluminum oxide, 4 parts of lithium aluminum titanate phosphate, and 2 parts of lithium lanthanum tantalate in...

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Abstract

The invention provides a preparation method of fluoro-compound gel polymer electrolyte membrane to obtain the electrolyte membrane high in electrochemical stability, and belongs to the technical fieldof lithium ion batteries. According to the scheme, the method comprises the steps that 1, according to weight parts, 5-50 parts of fluorine-containing vinyl monomer, 40-80 parts of gellable monomer and 0-3 parts of poly(ethylene glycol) methyl ether methacrylate monomer are added into 100-300 parts of solvent, nitrogen is introduced continuously, a mixture is stirred evenly, then 0.05-1.00 part of initiator is added, under a condition of 60 DEG C, reaction is carried out for 24 h, and after purification treatment is conducted, a polymer A is obtained; 2, 30-80 parts of polymer A and 0-20 parts of filler are added into 100-300 parts of solvent, in a dry nitrogen atmosphere, a mixture is stirred evenly, 0-2.00 parts of hydroxy cross-linking agent is added into a mixed system, mixed liquid is evenly coated onto a smooth mold, and in a nitrogen atmosphere, reaction is carried out; 3, after the reaction is completed, vacuum drying is conducted to obtain the fluoro-compound gel polymer electrolyte membrane.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a preparation method of a fluoropolymer gel polymer electrolyte membrane and a lithium ion battery. Background technique [0002] Lithium-ion batteries have the advantages of high voltage, no memory effect, wide operating temperature range, and environmental friendliness. They have been widely used in electric vehicles, digital, large-scale energy storage, and defense and military fields. At present, commercial lithium-ion batteries mainly use liquid electrolyte. During the use of lithium-ion batteries, liquid electrolytes will have safety problems such as liquid leakage, flammability and explosion due to external collision, extrusion and heating, which seriously restricts the use of lithium-ion batteries. Large-scale application of ion batteries. At present, although there are certain improvement measures for the safety of liquid lithium-ion batteries,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525C08F283/06C08F220/14C08F220/44C08F220/18C08F220/24C08F220/28C08F220/20C08F214/18
CPCH01M10/0525H01M10/0565C08F220/44C08F283/065H01M2300/0082C08F220/281C08F214/186C08F220/24C08F220/14C08F220/1804Y02E60/10
Inventor 唐伟超李素丽赵伟袁号李俊义徐延铭
Owner ZHUHAI COSMX BATTERY CO LTD
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