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Cross-linked modified polyimide single-ion polymer and gel polymer electrolyte thereof
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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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[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 PolymerElectrolyte by PolyimideSingle IonPolymer
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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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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...
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