Cross-linked modified polyimide single-ion polymer and gel polymer electrolyte thereof

A technology of polyimide single and ionic polymers, which is applied in the manufacture of composite electrolytes, non-aqueous electrolyte batteries, and electrolyte batteries, and can solve the problems of polymer electrolyte thermal stability and ion conductivity that are difficult to balance at the same time

Active Publication Date: 2020-10-09
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the thermal stability and ionic conductivity of the polymer electrolyte are difficult to take into account the defects simultaneously, the present invention provides a kind of cross-linked modified polyimide single-ion polymer and preparation method thereof, and adopts this Preparation of Gel Polymer Electrolyte by Polyimide Single Ion Polymer

Method used

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  • Cross-linked modified polyimide single-ion polymer and gel polymer electrolyte thereof
  • Cross-linked modified polyimide single-ion polymer and gel polymer electrolyte thereof
  • Cross-linked modified polyimide single-ion polymer and gel polymer electrolyte thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] A. Synthesis of polyimide with 50% hydroxyl content:

[0054] 2,2'-bis(3-amino-4-hydroxyphenyl)hexafluoropropane (AHHFP), 4,4'-oxydiphthalic anhydride (ODPA), and 4,4'-diaminobis Add 1.83g, 3.10g, and 1.00g of phenyl ether (ODA) respectively (molar ratio is 1:2:1), add 35mL of m-cresol, pass nitrogen, add a drying tube, stir evenly, heat up to 80°C and heat and stir 4h, then add 3.5mL of isoquinoline, stir evenly, heat to 180°C, react for 18h, pour the reaction liquid into ethanol, form fibers, wash with water and ethanol alternately, and dry for later use.

[0055] B. Preparation of polyimide containing double bonds:

[0056] Get 0.5g of polyimide obtained in step A, add it to a three-necked flask, dissolve in dimethylformamide (DMF), stir and add 1.07g of K 2 CO 3 , condensed and refluxed with nitrogen gas, heated to 100°C, continued to stir for 13 hours, poured the above reaction solution into deionized water, washed with ethanol and water alternately, and dried i...

Embodiment 2

[0066] A. Synthesis of polyimide with 70% hydroxyl content:

[0067] 2,2'-bis(3-amino-4-hydroxyphenyl)hexafluoropropane (AHHFP), 4,4'-oxydiphthalic anhydride (ODPA), and 4,4'-diaminobis Add 2.56g, 3.10g, and 0.60g of phenyl ether (ODA) respectively (the molar ratio is 7:10:3), add 25mL of m-cresol, pass nitrogen, add a drying tube, stir evenly, heat up to 80°C and heat and stir 4h, then add 2.5mL of isoquinoline, stir evenly, heat to 180°C, react for 18h, pour the reaction liquid into ethanol, form fibers, wash with water and ethanol alternately, dry for later use.

[0068] B. Preparation of polyimide containing double bonds:

[0069] Get 0.529g of the polyimide of step B, add it in the three-necked flask, dissolve in dimethylformamide (DMF), stir and add 1.07g of K 2 CO 3 , pass nitrogen gas to condense and reflux, heat up to 100°C, continue to stir and react for 13h, pour the above reaction solution into deionized water, wash with ethanol and water alternately, and vacuum...

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Abstract

The invention provides a cross-linked modified polyimide single-ion polymer. The cross-linked modified polyimide single-ion polymer has a chemical structure shown as formula (I). Polyimide and a 4-styrene sulfonyl(benzenesulfonyl)imide lithium salt are combined together by utilizing an enol click chemical reaction through ultraviolet curing, anions are better fixed on a polymer, and the transmission distance of lithium ions is shortened, so that the lithium ion transference number and the ionic conductivity of the polymer electrolyte prepared from the material are improved; meanwhile, pentaerythritol tetra(3-mercaptopropionate) (PETMP) can be connected with a plurality of lithium salt molecules, so that more lithium sources are provided; the transference number of electrolyte Li<+> can beincreased due to low lithium ion delocalization energy of lithium disulfimide of the 1, 4-styrene sulfonyl(benzenesulfonyl)imide lithium salt; a plasticizer with good thermal stability is also added to improve the ionic conductivity; and then, the thermal stability and ionic conductivity of the polymer gel electrolyte and the cycling stability of the battery are ensured, and the use safety of thelithium ion battery is ensured.

Description

technical field [0001] The invention belongs to the field of polymers and lithium ion batteries, and in particular relates to a polyimide single-ion polymer and a gel polymer electrolyte thereof. [0002] technical background [0003] With the development of electric vehicles and portable electronic devices, lithium-ion batteries (LIBs), as one of the most promising energy storage sources, have attracted much attention due to their high specific energy and high energy density. A traditional lithium-ion battery is composed of a liquid organic electrolyte, a separator, a positive electrode, and a negative electrode. However, currently the most widely used commercial liquid electrolyte LIBs suffer from severe safety issues, such as liquid leakage, flammability, and explosiveness. Many strategies have explored the use of polymer electrolytes instead of liquid electrolytes to prepare safer, high-performance batteries. Polymer electrolytes can be divided into solid polymer electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08J3/24H01M10/0525H01M10/0565H01M10/058
CPCC08G73/1042C08G73/1039C08G73/1071C08G73/1007C08J3/24H01M10/0565H01M10/058H01M10/0525H01M2300/0088C08J2379/08Y02E60/10Y02P70/50
Inventor 呼微梁笑笑朱广山谢海明卢云峰刘佰军
Owner NORTHEAST NORMAL UNIVERSITY
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