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Organic electrode material, preparation method thereof and application

A technology of organic electrodes and positive active materials, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as difficulty in satisfying charge and discharge performance, affecting electrode cycle performance, electrode material pulverization, etc., to achieve excellent cycle and rate performance, The effect of fast electrochemical reactivity and improved conductivity

Active Publication Date: 2020-06-09
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Causes the pulverization or even detachment of the electrode material, which in turn affects the cycle performance of the entire electrode
Secondly, the poor conductivity of organic molecules makes it difficult to meet the fast charge and discharge performance, which inhibits the application of organic materials as cathode materials for lithium-ion batteries.

Method used

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  • Organic electrode material, preparation method thereof and application
  • Organic electrode material, preparation method thereof and application
  • Organic electrode material, preparation method thereof and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: An organic electrode material for a lithium-ion battery, which is prepared by the following steps: under an inert atmosphere protected by nitrogen, tris(4-bromophenyl)amine and carbazole are added in a molar ratio of 1:5 into the three-necked flask, and then add the catalyst cuprous iodide, the ligand o-phenanthroline, and potassium carbonate into the reaction system according to the molar ratio (0.1:0.2:10), and use a syringe to inject 20 mL of anhydrous N,N-di Methylformamide was injected into the reaction system. Under the condition of heating an oil bath at 140-160° C., react for 72 hours to obtain a reactant.

[0024] The reactants cooled to room temperature were added into dichloromethane for further dissolution, and the filtrate obtained after suction filtration was poured into methanol solution to obtain a white precipitate. The white precipitate was washed three times with methanol and distilled water, respectively. The obtained precipitate was pla...

Embodiment 2

[0030] Embodiment 2: The difference between embodiment 2 and embodiment 1 is only that tris(4-bromophenyl)amine is replaced by 1,4-dibromobenzene.

Embodiment 3

[0031] Example 3: The difference between Example 3 and Example 1 is that 1,3,5-tribromobenzene is used instead of tris(4-bromophenyl)amine.

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Abstract

The invention belongs to the field of lithium ion batteries, and relates to an organic electrode material, a preparation method thereof and application. According to the organic electrode material, acompound containing a carbazole functional group is adopted as a positive electrode active material, the compound containing the carbazole functional group is R(carbazole)n, wherein R is an aromatic compound, n is an integer, and carbazole is a functional group containing carbazole. When the obtained organic electrode material is used as a positive electrode material of a lithium ion battery, thelithium ion battery has relatively high discharge voltage and excellent cycle and rate performance, still has the capacity of 38 mAh g <-1> under the current of 20 A g <-1>, still has the capacity of64 mAh g <-1> after being cycled for 2000 times for a long time under the current of 1A g <-1>, and has the capacity retention ratio of 64%.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and in particular relates to an organic electrode material and a preparation method and application thereof. Background technique [0002] In recent years, lithium-ion battery technology has been fully developed, continuously assisting portable devices and power vehicles, and providing many conveniences for people's lives. The reason why the pursuit of lithium-ion batteries can achieve the current prospects is because of the high voltage, high capacity and high stability brought about by the structure of graphite materials as the negative electrode and layered inorganic materials as the positive electrode. However, compared with the readily available graphite anode materials, the resource reserves, battery recycling, and preparation costs of inorganic cathode materials are worthy of further research and resolution. On the other hand, organic electrode materials are considered by researchers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/60H01M10/0525
CPCH01M4/608H01M10/0525Y02E60/10
Inventor 许运华赵晨杨继兴
Owner TIANJIN UNIV