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Preparation method of organic electrode material based on polyimide structure

An organic electrode and polyimide technology, applied in battery electrodes, structural parts, circuits, etc., can solve the problems of poor dispersion effect and low utilization rate of battery materials, and achieve efficiency improvement, cost reduction, and high cycle stability Effect

Active Publication Date: 2018-05-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the particle size of these materials is very small, the dispersion effect becomes a key factor in the addition process. In the traditional process, the grinding and mixing method is used. The dispersion effect achieved by this method is not good, and there are some in the prepared electrode material. The active material cannot participate in the charging and discharging process of the lithium-ion battery, which ultimately makes the material utilization rate of the battery not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Under the protection of nitrogen, ultrasonically disperse graphene oxide in 50mL DMF in a 100mL reactor to obtain a graphene oxide dispersion with a concentration of 5wt%. Add 0.5g HATU at room temperature and stir for 20min, then add 10g The urea was stirred and reacted at 60°C for 12 hours, filtered, washed, and vacuum dried at 80°C for 12 hours to obtain aminated graphene oxide.

[0027] (2) Under the protection of nitrogen, in a 250mL reactor, ultrasonically disperse 0.5g of the aminated graphene oxide obtained in step (1) in 100mL DMF, then add 0.36g urea and 1.072g NTCDA in sequence, and stir the reaction at 60℃. 4h; add isoquinoline and continue to stir the reaction at 110℃ for 4h; then heat to 160℃ and continue to stir the reaction for 1h, cool, filter, wash, and vacuum dry at 80℃ for 12h to obtain dark gray powder, then heat it in nitrogen at 400℃ 10h to obtain an organic electrode material based on a polyimide structure.

[0028] The organic electrode material...

Embodiment 2

[0030] (1) Under the protection of nitrogen, ultrasonically disperse graphene oxide in 50mL NMP in a 100mL reactor to obtain a graphene oxide dispersion with a concentration of 7wt%. Add 0.4g HATU at room temperature and stir for 20min, then add 2g The urea was stirred and reacted at 80°C for 24 hours, filtered, washed, and vacuum dried at 80°C for 12 hours to obtain aminated graphene oxide.

[0031] (2) Under the protection of nitrogen, in a 250mL reactor, ultrasonically disperse 1.5g of the aminated graphene oxide obtained in step (1) in 200mL of NMP, then add 0.5g of urea and 3.758g of PMDA in sequence, and stir to react at 60°C. 4h; add isoquinoline at 120℃ and continue to stir the reaction for 4h; then heat to 150℃ and continue to stir the reaction for 4h, cool, filter, wash, and vacuum dry at 80℃ for 12h to obtain dark gray powder, then heat it in nitrogen at 400℃ 6h, an organic electrode material based on the polyimide structure is obtained.

[0032] The organic electrode m...

Embodiment 3

[0034] (1) Under the protection of nitrogen, ultrasonically disperse carboxylated carbon nanotubes in 200 mL DMAc in a 300 mL reactor to obtain a carboxylated carbon nanotube dispersion with a concentration of 5wt%. Add 0.7g HATU and stir for 20 minutes at room temperature. Then, 5g of urea was added at 80°C and the reaction was continued for 24h, filtered, washed, and vacuum dried at 80°C for 12h to obtain aminated carboxylated carbon nanotubes.

[0035] (2) Under the protection of nitrogen, in a 250mL reactor, ultrasonically disperse 1.2g of the aminated carboxylated carbon nanotubes obtained in step (1) in 200mL DMAc, and then add 0.5g urea and 6.740g PTCDA in sequence at 60℃ Stir the reaction for 4 hours; add isoquinoline at 140°C and continue to stir the reaction for 3 hours; then heat to 160°C and continue to stir the reaction for 3 hours, cool, filter, wash, and vacuum dry at 80°C for 12 hours to obtain a dark gray powder, then place it in nitrogen 400 Heat treatment at ℃ ...

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Abstract

The invention relates to a preparation method for an organic electrode material based on a polyimide structure. The preparation method comprises the steps: under the nitrogen protection, dispersing anorganic conductive agent into a solvent, adding HATU and diamine monomer to perform stirring reaction and filtering, washing and vacuum drying to obtain an amination conductive agent; ultrasonicallydispersing into a solvent, then sequentially adding diamine monomer, dianhydride monomer and a catalyst to perform stirring reaction and cooling, filtering, washing and vacuum drying to obtain powder;performing thermal treatment under the inert atmosphere to obtain the organic electrode material based on the polyimide structure. When the organic electrode material is utilized as a lithium ion battery anode material, the electrochemical characteristics of high magnification and high cyclic stability are achieved. By means of the preparation method, an efficiency of active matters in the electrode material to participate a charge-discharge process is improved; thus, industrial production cost is reduced, and very large potential and industrial value are achieved.

Description

Technical field [0001] The invention belongs to the technical field of organic electrode materials, and particularly relates to a preparation method of an organic electrode material based on a polyimide structure. Background technique [0002] Lithium-ion batteries are a type of battery that plays an important role in modern information equipment. Since entering the market in the 1990s, its application market has gradually expanded with the development of the times and technology. It has been widely used in various mobile communications. In the field. In recent years, the emergence of new energy vehicles has made lithium-ion batteries, a new energy battery, further into people's lives. Of course, this is inseparable from its excellent performance. Compared with traditional nickel-chromium batteries, lithium-ion batteries have the advantages of long service life, high voltage, and large capacity. More recently, organic batteries in lithium-ion batteries have attracted much atte...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/60H01M4/62H01M10/0525
CPCH01M4/362H01M4/602H01M4/625H01M10/0525Y02E60/10
Inventor 赵昕陈朝逸张清华董杰甘峰谭文军
Owner DONGHUA UNIV
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