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Fluorine-containing polymer electrolytes and preparation methods and applications thereof

A technology of electrolyte and polymer, which is applied in the field of new fluorine-containing polymer electrolyte and its synthesis, can solve the problems of easy water absorption and low conductivity, and achieve the effect of improving conductivity, reducing interaction between ions, and mild preparation conditions

Active Publication Date: 2016-08-31
黑龙江省工研院资产经营管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a fluorine-containing polymer electrolyte and its preparation method and application

Method used

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  • Fluorine-containing polymer electrolytes and preparation methods and applications thereof
  • Fluorine-containing polymer electrolytes and preparation methods and applications thereof
  • Fluorine-containing polymer electrolytes and preparation methods and applications thereof

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Experimental program
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specific Embodiment approach 1

[0045] Specific implementation mode 1: The preparation method of fluoropolymer electrolyte I in this implementation mode is implemented according to the following steps:

[0046] 1. Under the protective atmosphere of inert gas, add sodium p-styrenesulfonate and polyethylene glycol methacrylate into the solvent according to the molar ratio of 1:1~3, and then add the initiator, at 70~80℃ After reacting at high temperature for 10 minutes, hexafluorobutyl methacrylate was added, and the reaction was continued for 15 to 30 minutes to obtain a polymerized product;

[0047] 2. Cast the polymer product into a polytetrafluoroethylene mold, dry and form a film to obtain the fluorine-containing polymer electrolyte I;

[0048] Wherein the hexafluorobutyl methacrylate accounts for 10%-30% of the molar content of the total reactants in step 1.

[0049] The reaction equation of the present embodiment polysodium p-styrene sulfonate-polyethylene glycol methacrylate-hexafluorobutyl methacrylat...

specific Embodiment approach 2

[0051] Specific implementation mode 2: The preparation method of the fluorine-containing polymer electrolyte II in this implementation mode is implemented according to the following steps:

[0052] 1. Under the protective atmosphere of inert gas, add sodium p-styrenesulfonate and polyethylene glycol methacrylate into the solvent according to the molar ratio of 1:1~3, and then add the initiator, at 70~80℃ After reacting at high temperature for 10 minutes, hexafluorobutyl methacrylate and ethylene carbonate were added, and the reaction was continued for 15 to 30 minutes to obtain a polymerized product;

[0053]2. Cast the polymer product into a polytetrafluoroethylene mold, dry and form a film to obtain the fluorine-containing polymer electrolyte II;

[0054] Wherein in step 1, hexafluorobutyl methacrylate accounts for 10%-15% of the molar content of the total reactants, and ethylene ethylene carbonate accounts for 10%-15% of the molar content of the total reactants.

[0055] T...

specific Embodiment approach 3

[0057] Specific embodiment three: the preparation method of the fluorine-containing polymer electrolyte III in this embodiment is implemented according to the following steps:

[0058] 1. Under the protective atmosphere of inert gas, add sodium p-styrenesulfonate and polyethylene glycol methacrylate into the solvent according to the molar ratio of 1:1~3, and then add the initiator, at 70~80℃ After reacting at high temperature for 10 minutes, hexafluorobutyl methacrylate was added, and the reaction was continued for 15 to 30 minutes to obtain a polymerized product;

[0059] 2. Add LiCl to deionized water to obtain a lithium salt solution, and then add the polymer product to the lithium salt solution for lithium salt replacement to obtain a replaced solution;

[0060] 3. Perform dialysis on the replaced solution, and then dry it in a vacuum oven after purging to obtain a dry polymer electrolyte;

[0061] 4. Dissolve the dried polymer electrolyte obtained in step 3 in N,N-dimeth...

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Abstract

The invention provides fluorine-containing polymer electrolytes and preparation methods and applications thereof, relates to novel fluorine-containing polymer electrolytes and synthesis methods thereof, and aims at solving the problems that an existing polymer electrolyte containing a polyoxyethylene structure easily absorbs water and is relatively low in conductivity. The fluorine-containing polymer electrolytes are formed by ternary polymerization of sodium p-styrene sulfonate, polyethylene glycol methacrylate and hexafluorobutyl methacrylate, or tetrapolymerization of sodium p-styrene sulfonate, polyethylene glycol methacrylate, hexafluorobutyl methacrylate and ethylene vinyl carbonate; and the two fluorine-containing polymer electrolytes can also be put into a lithium salt solution for lithium salt replacement and applied to an all-solid-state lithium-ion battery as the electrolytes. A perfluoroalkyl group with strong electron-withdrawing property is introduced into the structure, so that ionization of lithium ions is promoted; the ionic conductivity is improved; the hydrophilicity of a polymer is reduced; and the mechanical property of an electrolyte membrane is improved.

Description

technical field [0001] The invention relates to a novel fluorine-containing polymer electrolyte and a synthesis method thereof, and relates to an application in an all-solid-state polymer lithium ion battery. Background technique [0002] All-solid-state polymer lithium-ion battery is a new generation of high-energy battery system developed on the basis of liquid lithium-ion batteries. It is a new concept battery proposed to solve the safety problems of liquid lithium-ion batteries. Polyoxyethylene (PEO) is currently recognized as the most suitable matrix for the preparation of all-solid-state electrolytes, and the polymer electrolytes of this system have been extensively studied. [0003] Studies in recent years have shown that the structure of solid polymer electrolytes has a significant impact on its electrical conductivity and mechanical properties, and the ion migration number of solid polymer electrolytes is close to 1 (Hyukkeun Oh et al., Poly(arylene ether)-BasedSing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M2300/0082Y02E60/10
Inventor 陈向群孙秋蒋松孙馗善陈健文田文斌于立成
Owner 黑龙江省工研院资产经营管理有限公司
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