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Application of triphenylamine derivative polymer as lithium ion batteries cathode material

A lithium-ion battery, cathode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as large particles and inter-particle agglomeration, and achieve high charge-discharge specific capacity, significant charge-discharge voltage platform, good fast charge and discharge. The effect of discharge performance

Active Publication Date: 2012-10-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the biggest defect of the polytriphenylamine material is that the particles are large and the inter-particle agglomeration phenomenon is very obvious, which limits the further improvement of the battery performance of the material.

Method used

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  • Application of triphenylamine derivative polymer as lithium ion batteries cathode material
  • Application of triphenylamine derivative polymer as lithium ion batteries cathode material
  • Application of triphenylamine derivative polymer as lithium ion batteries cathode material

Examples

Experimental program
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Effect test

Embodiment 1

[0034] PPT1N

[0035] PT1N monomer synthesis. Add 30 mL of anhydrous tetrahydrofuran to a previously dried 250 mL three-neck flask, and then add excess magnesium powder (3.02 g). 2-Bromothiophene (6 mL) was added dropwise while stirring, and the reaction released a lot of heat. To prevent the temperature from being too high, the temperature should be cooled with a cold water bath to control the reaction to proceed steadily for 5 hours. The prepared Grignard reagent suspension was quickly transferred to a dry constant pressure separatory funnel, and added dropwise to 50 mL of 4,4',4"-tribromotriphenylamine (5 g) and 1,1'- In the dry tetrahydrofuran solution of [bis(diphenylphosphino)ferrocene]palladium dichloride (0.5g) catalyst, the temperature of the reaction solution is controlled to be 60°C, and stirred for 12h under a nitrogen atmosphere to reach the end of the reaction. The reaction is performed with saturated chlorine The ammonium chloride aqueous solution is terminate...

Embodiment 2

[0045] PPT2N

[0046] PT1N tribromide synthesis. 30 mL of DMF was added to a pre-dried 250 mL three-necked flask, followed by the prepared PT1N (1.5 g). Add 20 mL of a DMF solution containing NBS (1.6 g) dropwise while stirring in an ice bath, and react in the dark for 5 h. After the reaction was completed, a large amount of ice water was added, the filter cake was obtained by filtration, and vacuum-dried at 60° C. for 24 hours. The yield is 92%, and the product is a light green solid powder.

[0047] PT2N monomer synthesis. Add 30 mL of anhydrous tetrahydrofuran to a previously dried 250 mL three-neck flask, and then add excess magnesium powder (1.65 g). Add 2-bromothiophene (3.33mL) dropwise while stirring, the reaction emits a lot of heat, in order to prevent the temperature from being too high, cool with a cold water bath to control the temperature, and control the reaction to proceed steadily for 5h. The prepared Grignard reagent suspension was quickly transferred to...

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Abstract

The invention provides an application of a triphenylamine derivative polymer as a lithium ion batteries cathode material, belonging to the technical field of lithium ion battery. The triphenylamine derivative is a triphenylamine derivative polymer containing triphenylamine and thiophene structure. By introducing an electroactive conjugated monomer in the polytriphenylamine backbone, the microscopic morphology of the polymer is significantly improved, the conductivity and conjugate capability of the polymer are enhanced, so that the cathode material has high specific capacity, excellent cycling stability, significant charge-discharge voltage platform, and good rapid charge and discharge performance, etc.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to the application of a conductive polymer of polytriphenylamine derivatives in lithium ion battery cathode materials. Background technique [0002] With the further development of human society, the energy problems, resource problems and environmental problems facing the world are becoming more and more serious. Since the current energy structure is basically based on petrochemical fuels (petroleum, coal, natural gas), this not only causes resource depletion but also pollutes the environment. Electric energy will play an increasingly important role in the future due to its cleanliness, safety and convenience. Therefore, in the future, lithium-ion batteries with good mobility and convenient storage and power supply will play a pivotal role in a society based on electric energy. [0003] Traditional lithium-ion battery cathode materials mainly use transiti...

Claims

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Application Information

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IPC IPC(8): H01M4/60C08G61/12
CPCY02E60/12Y02E60/10
Inventor 张诚苏畅叶银鹏王灵敏杨芳
Owner ZHEJIANG UNIV OF TECH
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