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A kind of solid electrolyte and preparation method thereof

A solid electrolyte and reaction medium technology, applied in solid electrolytes, non-aqueous electrolytes, circuits, etc., can solve the problem that polymer electrolytes cannot have good mechanical strength and ionic conductivity at the same time, and achieve good mechanical properties and high ionic conductivity. , the effect of high conductivity

Active Publication Date: 2018-07-31
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that polymer electrolytes in the prior art cannot have good mechanical strength and good ionic conductivity at the same time, an embodiment of the present invention provides a solid electrolyte and a preparation method thereof

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  • A kind of solid electrolyte and preparation method thereof
  • A kind of solid electrolyte and preparation method thereof
  • A kind of solid electrolyte and preparation method thereof

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Embodiment 1

[0031] Embodiment 1 of the present invention provides a method for preparing a solid electrolyte, the method comprising:

[0032] React urea and sulfonyl chloride in the reaction medium phosphorus oxychloride, the reaction temperature is 80-90°C, the reaction time is 5-6h, the molar ratio of urea to sulfonyl chloride is 1:2, the molar ratio of urea to reaction medium Be 1:25, obtain sulfonylurea polymer;

[0033] Dissolve polyphenylene sulfone in dichloromethane and add dichlorosulfonic acid, the molar ratio of polyphenylene sulfone to dichlorosulfonic acid is 1:2.02, and the molar ratio of polyphenylene sulfone to dichloromethane is 1 : 2, obtain polyphenylene sulfone sulfonic acid polymer;

[0034] Purifying the polyphenylene sulfone sulfonic acid polymer by distillation under reduced pressure;

[0035] Carry out condensation reaction between sulfonylurea polymer and purified polyphenylene sulfone sulfonic acid polymer, the molar ratio of polyphenylene sulfone sulfonic aci...

Embodiment 2

[0046] Embodiment 2 of the present invention provides a method for preparing a solid electrolyte, the method comprising:

[0047] React urea and sulfonyl chloride in the reaction medium phosphorus trichloride, the reaction temperature is 80-90°C, the reaction time is 5-6h, the molar ratio of urea to sulfonyl chloride is 2:1, the molar ratio of urea to reaction medium Be 2:25, obtain sulfonylurea polymer;

[0048] Dissolve polyphenylene sulfone in dichloromethane and add dichlorosulfonic acid, the molar ratio of polyphenylene sulfone to dichlorosulfonic acid is 1:10.1, and the molar ratio of polyphenylene sulfone to dichloromethane is 1 : 10, obtain polyphenylene sulfone sulfonic acid polymer;

[0049] Purifying the polyphenylene sulfone sulfonic acid polymer by distillation under reduced pressure;

[0050] Carry out condensation reaction between sulfonylurea polymer and purified polyphenylene sulfone sulfonic acid polymer, the molar ratio of polyphenylene sulfone sulfonic ac...

Embodiment 3

[0059] Embodiment 3 of the present invention provides a method for preparing a solid electrolyte, the method comprising:

[0060] React urea and sulfonyl chloride in the reaction medium phosphorus oxychloride, the reaction temperature is 80-90°C, the reaction time is 5-6h, the molar ratio of urea to sulfonyl chloride is 1:1, the molar ratio of urea to reaction medium Be 1.5:25, obtain sulfonylurea polymer;

[0061] Dissolve polyphenylene sulfone in dichloromethane and add dichlorosulfonic acid, the molar ratio of polyphenylene sulfone to dichlorosulfonic acid is 1:5, and the molar ratio of polyphenylene sulfone to dichloromethane is 1 :5, obtain polyphenylene sulfone sulfonic acid polymer;

[0062] Purifying the polyphenylene sulfone sulfonic acid polymer by distillation under reduced pressure;

[0063] The sulfonylurea polymer and the purified polyphenylene sulfone sulfonic acid polymer are subjected to a condensation reaction, and the molar ratio of the polyphenylene sulfo...

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Abstract

The invention discloses a solid electrolyte and a preparation method thereof, belonging to the field of polymer materials. The method comprises: preparing a sulfonylurea polymer and a polyphenylene sulfone sulfonic acid polymer; performing a condensation reaction on the sulfonylurea polymer and the polyphenylene sulfone sulfonic acid polymer to obtain a polysulfoxide sulfonylurea; The polysulfoxide sulfonylurea and the polyethylene oxide are subjected to a condensation reaction, and the product is subjected to ring-opening polymerization with an epoxy resin to obtain a polysulfoxide sulfonylurea / polyoxyethylene cross-linked compound; the polysulfoxide The sulfone sulfonylurea / polyethylene oxide cross-linked complex is dissolved in chloroform, and the polysulfoxide sulfonylurea / polyoxyethylene cross-linked complex is subjected to lithium ion exchange treatment with an acidic solution of lithium hydride; The sulfone sulfonylurea / polyethylene oxide cross-linked composite is treated with lithium ions to obtain a solid electrolyte. The solid electrolyte has good mechanical strength and good ion conductivity.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a solid polymer electrolyte and a preparation method thereof. Background technique [0002] Due to the advantages of high power density, low self-discharge rate, no memory effect and stable discharge voltage, lithium-ion batteries have gradually become the power source of electric vehicles, electric tools and other products. [0003] In the components of lithium-ion batteries, the electrolyte is one of the key materials of the battery. Commonly used liquid electrolytes have disadvantages such as low specific energy, easily corroded electrode materials, and difficult design and assembly. There are still certain limitations in the three-dimensional design and application fields of batteries. limited. The shortcomings of existing liquid electrolytes need to be overcome to expand the application range of lithium batteries. Because polymer electrolytes have good plasticity, flexibil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M2300/0082Y02E60/10
Inventor 曹元成刘继延刘学清程琦邹琳玲
Owner JIANGHAN UNIVERSITY