Polymer electrolyte with flame retardant function and preparation and application thereof

A technology of polymers and electrolytes, applied in electrolytes, non-aqueous electrolytes, solid electrolytes, etc., can solve the problems of inability to effectively inhibit the growth of lithium dendrites and uneven distribution of inorganic fillers, achieve excellent thermal stability, and solve poor mechanical properties. Good, good mechanical properties and the effect of flexibility

Inactive Publication Date: 2019-10-25
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, inorganic fillers are difficult to be compatible with the polymer matrix, resulting in uneve

Method used

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  • Polymer electrolyte with flame retardant function and preparation and application thereof
  • Polymer electrolyte with flame retardant function and preparation and application thereof
  • Polymer electrolyte with flame retardant function and preparation and application thereof

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preparation example Construction

[0067] Correspondingly, taking lithium-ion batteries as the planned application object as an example, the preparation method of the polymer electrolyte with flame-retardant function may include the following steps:

[0068] I, the synthesis of flame retardant structure hexaphenol aminocyclophosphazene HCP, specifically include:

[0069] (1) dissolving hexachlorocyclotriphosphazene and acetaminophen in an organic solvent, adding alkali, and stirring under reflux reaction to obtain a reaction solution;

[0070] (2) The reaction solution described in step (1) is poured into a precipitating agent for precipitation, and is filtered and dried to obtain hexaacetamidophenol cyclophosphazene;

[0071] (3) dissolving the hexaacetamidophenol cyclic phosphazene described in step (2) in an organic solvent, adding alkali, and stirring and reflux reaction, and filtering to obtain hexaphenolaminocyclic phosphazene HCP after the reaction;

[0072] II. Synthesis of cross-linking agent polyethy...

Embodiment 1

[0094] Hexaphenol aminocyclophosphazene HCP-polyethylene glycol diglycidyl ether PEGDE 200 Flame retardant polymer electrolyte.

[0095]The preparation method of the flame-retardant polymer electrolyte is as follows: 5.0 g of hexachlorocyclotriphosphazene and 17.4 g of 4-acetaminophenol were dissolved in 200 mL of acetone solution, and 29.9 g of potassium carbonate powder was added. Under argon protection, with mechanical stirring, the reaction was refluxed at 60° C. for 5 days. After the reaction, the remaining reaction solution was poured into water for precipitation, stirred and washed. Filter, wash with water three times, suck dry, and dry in a vacuum oven at 50°C for 48 hours to obtain white crystals. Dissolve 25.0 g of hexaacetylphenol-based cyclophosphazene in 300 mL of methanol, add dropwise an aqueous solution in which 58.0 g of NaOH is dissolved, and raise the temperature to 90° C. under the protection of argon, and stir and reflux for 5 days. After the reaction, ...

Embodiment 2

[0098] Hexaphenol aminocyclophosphazene HCP-polyethylene glycol diglycidyl ether PEGDE 4000 Flame retardant polymer electrolyte.

[0099] The preparation method of the flame-retardant polymer electrolyte is as follows: 5.0 g of hexachlorocyclotriphosphazene and 17.4 g of 4-acetamidophenol were dissolved in 200 mL of tetrahydrofuran solution, and 29.9 g of potassium carbonate powder was added. Under argon protection, with mechanical stirring, the reaction was refluxed at 60° C. for 1 day. After the reaction, the remaining reaction solution was poured into water for precipitation, stirred and washed. Filter, wash with water three times, suck dry, and dry in a vacuum oven at 50°C for 48 hours to obtain white crystals. Dissolve 25.0 g of hexaacetylphenol-based cyclophosphazene in 300 mL of methanol, add dropwise an aqueous solution in which 58.0 g of NaOH is dissolved, and raise the temperature to 100° C. under the protection of argon, and stir and reflux for 5 days. After the ...

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Abstract

The invention belongs to the field of polymer electrolytes, and discloses a polymer electrolyte with a flame retardant function and preparation and application thereof. The polymer electrolyte comprises a metal salt and a cross-linked polymer formed by taking hexaphenol amino cyclophosphazene as an inner core and polyethylene glycol diglycidyl ether as a cross-linking arm, wherein the chemical structural formula of the cross-linked polymer is shown in the description, and n is an integer ranging between 4 and 113. By improving the key structure and composition of the polymer electrolyte and the overall process design of the corresponding preparation method, the polymer electrolyte which can be applied to metal ion batteries such as lithium-ion batteries and has the flame retardant functionis obtained. Compared with the prior art, the safety problems such as low ionic conductivity, poor mechanical performance and easy combustion and explosion of the polymer electrolyte can be effectively solved.

Description

technical field [0001] The invention belongs to the field of polymer electrolytes, and more specifically relates to a polymer electrolyte with a flame-retardant function and its preparation and application. Background technique [0002] For metal ion batteries represented by lithium ion batteries, the electrolyte is one of the important factors affecting the performance of lithium ion batteries. At present, commercial lithium batteries are still dominated by liquid electrolytes, but a large amount of organic solvents in liquid electrolytes are flammable and explosive, which poses a severe challenge to the safety of lithium-ion batteries. Compared with liquid electrolytes, solid electrolytes have the advantages of high energy density, light weight, and high mechanical strength. In particular, solid polymer electrolytes can be rationally designed according to different performance requirements to obtain functional electrolytes. Based on the above advantages, polymer electroly...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/0562C08G65/335
CPCC08G65/3356H01M10/0562H01M10/0565H01M2300/0065H01M2300/0091Y02E60/10
Inventor 薛志刚左偲杨梦玲刘承美周兴平王志军陈功解孝林
Owner HUAZHONG UNIV OF SCI & TECH
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