A kind of polyurethane, polyurethane solid electrolyte and preparation method and application thereof

A solid electrolyte, polyurethane technology, applied in solid electrolytes, non-aqueous electrolytes, circuits, etc., can solve the problems of insufficient strength, toughness, high glass transition temperature, low glass transition temperature, etc. Good thermal stability and the effect of lowering the glass transition temperature

Active Publication Date: 2021-04-06
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a kind of polyurethane in order to overcome the defects of insufficient strength and toughness and high glass transition temperature described in the above-mentioned prior art. The polyurethane provided has the advantages of high strength and high toughness, low glass transition temperature, and thermal Good stability, good mechanical properties and high ionic conductivity when used in solid electrolytes

Method used

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  • A kind of polyurethane, polyurethane solid electrolyte and preparation method and application thereof

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Effect test

Embodiment 1

[0060] This embodiment provides a kind of polyurethane, and this polyurethane obtains by following preparation method:

[0061] Under the protection of high-purity nitrogen, 150 mL of N, N-dimethylformamide solution dissolved with 6.00 g of dry polycaprolactone diol (Mn=2000) was added to a 250 mL three-necked flask with mechanical stirring, and the temperature was raised. After reaching 80°C, add 1.501g of diphenylmethane diisocyanate monomer and 0.025g of dibutyltin dilaurate catalyst, and after 1 hour, add 0.960g of dihydromyricetin, continue to react for 2 hours, pour into a silica gel mold, and place in an oven Dry at 80°C to obtain polyurethane based on dihydromyricetin.

Embodiment 2

[0063] This embodiment provides a kind of polyurethane, and this polyurethane obtains by following preparation method:

[0064] Under the protection of high-purity nitrogen, 150 mL of N, N-dimethylformamide solution dissolved with 6.00 g of dry polycaprolactone diol (Mn=2000) was added to a 250 mL three-necked flask with mechanical stirring, and the temperature was raised. After reaching 80°C, add 1.501g of diphenylmethane diisocyanate monomer and 0.025g of dibutyltin dilaurate catalyst, and after 1 hour, add 0.480g of dihydromyricetin, continue to react for 3 hours, pour into a silica gel mold, and place in an oven Dry at 80°C to obtain polyurethane based on dihydromyricetin.

Embodiment 3

[0066] This embodiment provides a kind of polyurethane, and this polyurethane obtains by following preparation method:

[0067] Under the protection of high-purity nitrogen, 150 mL of N, N-dimethylformamide solution dissolved with 6.00 g of dry polycaprolactone diol (Mn=2000) was added to a 250 mL three-necked flask with mechanical stirring, and the temperature was raised. After reaching 80°C, add 1.501g of diphenylmethane diisocyanate monomer and 0.025g of dibutyltin dilaurate catalyst, and after 1 hour, add 0.320g of dihydromyricetin, continue to react for 5 hours, pour into a silica gel mold, and place in an oven Dry at 80°C to obtain polyurethane based on dihydromyricetin.

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Abstract

The invention discloses a polyurethane, a polyurethane solid electrolyte and its preparation method and application. The polyurethane is mainly prepared from the following raw materials in parts by weight: 15-34 parts of diisocyanate monomer, 35-85 parts of diol monomer, 4-17 parts of flavonol monomers containing at least three hydroxyl groups; the diol is polyether diol and / or polyester diol. The polyurethane of the invention has the advantages of high strength and high toughness, low glass transition temperature, good thermal stability, good mechanical properties and high ion conductivity when used in solid state electrolytes. Moreover, after adding metal ions, the flavonol monomer structure forms a coordination bond with the metal ions, which further enhances the strength and toughness of the polyurethane, further reduces the glass transition temperature, and endows the polyurethane with better mechanical properties and good thermal stability. In addition, the polyurethane has a simple structure and is easy to synthesize and prepare.

Description

technical field [0001] The invention relates to the technical field of polymer materials, more specifically, to a polyurethane, a polyurethane solid electrolyte, a preparation method and application thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, long service life, and no memory effect, and are widely used in electronic products, electric vehicles and other fields. The electrolyte material has a great impact on the safety and stability of the overall battery. The widely used liquid electrolyte is easy to corrode the electrode sheet, and the thermal safety of the organic electrolyte is insufficient, which is easy to cause accidents such as fire and explosion. [0003] Solid-state electrolytes do not use electrolytes, which can avoid the safety problems caused by liquid electrolytes. However, at present, solid-state electrolytes mainly use PEO as the main raw material. Although this material has good ionic conductivity,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/73C08G18/66C08G18/48C08G18/42C08G18/10C08G18/12C08G18/32H01M10/0525H01M10/0565
CPCC08G18/10C08G18/12C08G18/4018C08G18/4277C08G18/4833C08G18/4854C08G18/73C08G18/7671H01M10/0525H01M10/0565H01M2300/0082C08G18/3218Y02E60/10
Inventor 曹园容敏智章明秋
Owner SUN YAT SEN UNIV
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