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Micro-mesoporous polytriphenylamine derivative applied to lithium battery, as well as preparation method thereof

A polytriphenylamine and micro-mesoporous technology, applied in battery electrodes, secondary batteries, electrochemical generators, etc., to achieve high charge-discharge specific capacity, superior charge-discharge performance, and excellent fast charge-discharge performance

Inactive Publication Date: 2016-12-07
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although TDATA has been extensively studied in the field of organic electroluminescent materials, new derivatives of polytriphenylamine with high free radical density can be prepared by polymerization, and co-polymers with micro-mesoporous morphology can be prepared by controlling the polymerization reaction conditions. At the same time, there is no literature report on the study of it as the positive electrode material of lithium battery

Method used

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  • Micro-mesoporous polytriphenylamine derivative applied to lithium battery, as well as preparation method thereof
  • Micro-mesoporous polytriphenylamine derivative applied to lithium battery, as well as preparation method thereof
  • Micro-mesoporous polytriphenylamine derivative applied to lithium battery, as well as preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] Preparation of polymer (PTDATA)

[0034] (1) Synthesis of 4,4′,4"-tris(N,N-diphenylamino)triphenylamine (TDATA)

[0035] In a dry 250 mL three-necked flask, add 2.492 g (4 mmol) iodotriphenylamine, 2.708 g (16 mmol) diphenylamine, 0.337 g palladium acetate, 2.244 g potassium tert-butoxide, then add 100 mL o-xylene, and stir dissolved, and added 4.8 mL of tributylphosphine to the reaction system with a syringe under nitrogen protection, and stirred and refluxed at 120°C for 12 hours. After the reaction was completed, the solution was filtered while it was hot, added with chloroform and distilled water for repeated washing several times, and the obtained extract was evaporated to dryness with a rotary evaporator to obtain a light yellow solid. The solid was then dissolved in chloroform, and decolorized with a short silica gel column to obtain a light yellow solution, which was spin-dried to obtain a light yellow crude product. The solid was recrystallized from tetrahydr...

Embodiment 2

[0039] Electrode preparation and battery assembly

[0040] (1) Preparation of electrodes. Electrode sheets were prepared on the surface of aluminum foil by coating method. Dissolve the active material polymer powder: conductive agent acetylene black: binder PVDF = mass ratio 4:5:1 in the solvent N-methylpyrrolidone (NMP) to form a viscous liquid. Then the liquid was coated on a clean aluminum foil with a 90 nm doctor blade, and then dried in vacuum at 60 °C until the quality of the film remained unchanged.

[0041] (2) Assembly of the battery. In this paper, the CR2032 battery device system is mainly used to test the electrochemical performance and charge and discharge performance of the battery. Lithium is used as the negative electrode and reference electrode, and the electrolyte is 1 M LiPF 6 EC:DMC =1:1 (v / v) solution, the diaphragm is a polypropylene microporous membrane (Celgard 2300) used in industrialization, the electrode prepared before is the positive electrode,...

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Abstract

The invention provides a micro-mesoporous polytriphenylamine derivative applied to a lithium battery, as well as a preparation method thereof, relates to a lithium ion battery material and a preparation method thereof, and discloses a micro-mesoporous structured polytriphenylamine derivative with high free radical density, an application thereof and a lithium battery prepared from the polytriphenylamine derivative. The micro-mesoporous structured polytriphenylamine derivative is prepared by taking 4,4',4'-tris(N,N-diphenylamino)triphenylamine as a monomer by virtue of a chemical oxidative polymerization method. Such a polytriphenylamine derivative material is of a micro-mesoporous structure and fiber morphology, is used as a lithium ion battery cathode material, and has high charge and discharge performance, cyclic stability and rate performance.

Description

technical field [0001] The invention relates to a lithium ion battery material and a preparation method thereof, in particular to a micro-mesoporous polytriphenylamine derivative applied to a lithium battery and a preparation method thereof. Background technique [0002] With the rapid development of the global economy, human beings are facing many problems in the process of development, among which energy is the basis for human survival and the source of world economic growth. Therefore, energy issues have become a topic of discussion worldwide in the 21st century. hot topic. Electric energy shows its superiority due to its clean, safe, and convenient features. The rapid development of portable electronic devices forces chemical power sources to develop towards light, small, and long-lasting types. This has also given birth to the lithium-ion battery industry with high energy density, light weight, and long cycle life. [0003] Traditional lithium-ion battery cathode mate...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M10/0525
CPCH01M4/602H01M10/0525Y02E60/10
Inventor 苏畅何晖晖徐立环
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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