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Organic polymer based on anthraquinone and preparation method and application of organic polymer as lithium-ion battery cathode material

A polymer and anthraquinone technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of limited practical application, unsatisfactory rate performance of organic electrode materials, poor conductivity, etc., and achieve excellent rate performance, cycle performance and Good magnification performance and improved stability

Inactive Publication Date: 2019-03-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the current organic electrode materials, whether they are small molecular compounds or polymers, have the problem of poor conductivity, which makes the rate performance of organic electrode materials unsatisfactory, which limits their practical applications in some fields.

Method used

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  • Organic polymer based on anthraquinone and preparation method and application of organic polymer as lithium-ion battery cathode material
  • Organic polymer based on anthraquinone and preparation method and application of organic polymer as lithium-ion battery cathode material
  • Organic polymer based on anthraquinone and preparation method and application of organic polymer as lithium-ion battery cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-

[0040] Embodiment 1-monomer synthesis

[0041]Take a 500mL check bottle with a built-in magnet; after drying, add 2.24g (14.5mmol, 1.0eqv) 5-norbornene-2,3-dimethanol, 8g 2-carboxyanthraquinone under nitrogen atmosphere (32.0mmol, 2.2eqv), 0.264g (0.220mmol, 0.15eqv) 4-dimethylaminopyridine and 6.52g (36.3mmol, 2.5eqv) 1-(3-dimethylaminopropyl)-3-ethyl carbon Diimine hydrochloride, add 400mL of dichloromethane with a syringe, and react at 20°C for 24h under magnetic stirring. The organic phase was successively washed twice with 1N dilute hydrochloric acid, saturated sodium bicarbonate, water, and saturated saline, and 300 mL of the aqueous phase was used for each extraction. Finally, the organic phase was dried with anhydrous magnesium sulfate for about half an hour, filtered through a funnel with a sand core, concentrated by rotary evaporation, and 100 mL of neutral alumina was added to fry the sample. Neutral alumina was used to pass through the column, and the eluent was ...

Embodiment 2-

[0042] Embodiment 2-monomer synthesis

[0043] Take a 500mL branch bottle with a built-in magnet. After drying, under argon atmosphere, add 2.24g (14.5mmol, 1.0eqv) 5-norbornene-2,3-dimethanol, 9.1g 2-carboxyanthraquinone (36.4mmol, 2.5eqv), 0.352g (0.29mmol, 0.15eqv) 4-dimethylaminopyridine and 7.80g (43.5mmol, 2.5eqv) 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, added by syringe 400mL of dichloromethane was reacted at 30°C for 10h under magnetic stirring. The organic phase was successively washed twice with 1N dilute hydrochloric acid, saturated sodium bicarbonate, water, and saturated saline, and 300 mL of the aqueous phase was used for each extraction. Finally, the organic phase was dried with anhydrous magnesium sulfate for about half an hour, filtered through a funnel with a sand core, concentrated by rotary evaporation, and 100 mL of neutral alumina was added to fry the sample. Neutral alumina was used to pass through the column, and the eluent was pe...

Embodiment 3-

[0044] Embodiment 3-monomer synthesis

[0045] Take a 500mL branch bottle with a built-in magnet. After drying, under nitrogen atmosphere, add 2.24g (14.5mmol, 1.0eqv) 5-norbornene-2,3-dimethanol, 10.9 2-carboxyanthraquinone (43.6mmol, 3.0eqv), 0.528g (0.440 mmol, 0.30eqv) 4-dimethylaminopyridine and 10.4g (58.1mmol, 4.0eqv) 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, add 400mL tetrahydrofuran with a syringe , Under magnetic stirring, react overnight at 35°C for 5h. After the organic phase was spin-dried, 400 mL of dichloromethane was added, followed by washing twice with 1N dilute hydrochloric acid, saturated sodium bicarbonate, water, and saturated saline, and 300 mL of the aqueous phase was used for each extraction. Finally, the organic phase was dried with anhydrous magnesium sulfate for about half an hour, filtered through a funnel with a sand core, concentrated by rotary evaporation, and 100 mL of neutral alumina was added to fry the sample. Neutral a...

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Abstract

The invention relates to an organic polymer based on anthraquinone and a preparation method and application of the organic polymer as a lithium-ion battery cathode material. The polymer is poly[norbornene 2, 3-dimethyl alcohol dimer (anthraquinone 2-carboxylic acid) ester]; a pure monomer is obtained under catalysis of 4-dimethylaminopyridine and 1-(3-dimethylaminopropyl)-3-ethyl carbodiimide hydrochloride by 5-norborne-2, 3-dimethyl carbinol and 2-carboxyl anthraquinone; and the monomer is dissolved in a good solvent, a catalytic agent is added,a polymerization reaction is terminated with vinyl ethyl ether, and the polymer is obtained. Synthesis is simple, and raw materials are easy to obtain. The polymer electrode is applied to lithium battery cathode materials. At a high rate (1C), capacity retention is as high as 96% after 450 cycles, and stability is greatly improved. The specific capacity can reach 145mAh / g at a current density of 5C, and excellent rate performance is shown.

Description

technical field [0001] The invention belongs to the technical field of organic electrode materials for lithium ion batteries, and in particular relates to an anthraquinone-based organic polymer, a preparation method and an application as a positive electrode material for lithium ion batteries. Background technique [0002] As an energy storage device with the highest energy density, lithium-ion batteries have been widely used in all aspects of social life, especially in portable electronic products. The cathode materials currently used in lithium-ion batteries are metal oxides or phosphides, such as LiCoO 2 、LiFePO 4 And nickel-cobalt-manganese ternary materials, etc. With the rapid development of electric vehicles and smart grids, it is necessary to seek high energy density and cheap large-scale energy storage systems to meet market demand. In the large-scale use of lithium batteries, noble metal compounds have the disadvantages of high cost, high pressure on the environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/08H01M4/60H01M10/0525
CPCC08G61/08C08G2261/11C08G2261/1426C08G2261/3324C08G2261/418H01M4/606H01M10/0525Y02E60/10
Inventor 杨继兴许运华孙鹏飞石叶青
Owner TIANJIN UNIV
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