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Preparation method and application of 2, 6-diaminopyridine-1, 3, 5-triazine polymer

A diaminopyridine and polymer technology, applied in 2 fields, can solve the problems of incompatibility, limit the energy density and overall performance of the full battery, and achieve the effects of easy synthesis, stable performance and low cost

Pending Publication Date: 2022-03-11
HUANGHE S & T COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is that graphite, a widely used lithium-ion negative electrode material, has a theoretical upper limit of specific capacity of only 372mAh / g, which limits the further improvement of the energy density and overall performance of the full battery, and is not suitable for the actual needs of contemporary long-life and large-capacity batteries.

Method used

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  • Preparation method and application of 2, 6-diaminopyridine-1, 3, 5-triazine polymer
  • Preparation method and application of 2, 6-diaminopyridine-1, 3, 5-triazine polymer
  • Preparation method and application of 2, 6-diaminopyridine-1, 3, 5-triazine polymer

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Experimental program
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Embodiment 1

[0026] Polymer preparation method

[0027] Add 6.0mmol of 2,6-diaminopyridine and 4.0mmol of 2,4,6-trichloro-1,3,5-triazine into a 50ml pressure-resistant reaction flask, and add 15.0ml of dioxane and 5.0ml of triethylamine, after ultrasonication for 0.5h, stirred and reacted at 120°C for 24 hours under the protection of nitrogen. After natural cooling, the solid product was filtered out with suction, washed with dioxane, ethanol, water, and ethanol in sequence, and after preliminary drying, the crude product was purified by Soxhlet extraction with methanol and dichloromethane as solvents. A turmeric yellow solid powder was obtained.

Embodiment 2

[0029] Preparation of high-performance lithium battery negative electrode:

[0030] Assemble the button cell (CR2032) in the glove box, with the compound of N-CTFS-PPT as the working electrode, the diaphragm adopts the polypropylene film, the lithium foil is the opposite electrode, the fluoroethylene carbonate containing 5.0% of the lithium hexafluorophosphate of 1mol / L A mixture of ethylene carbonate (EC) and dimethyl carbonate (DMC) (volume fraction 1:1) was used as the electrolyte. Corresponding electrochemical performance tests were carried out on NEWARE electrochemical test system (5V / 10mA, Shenzhen, China) and PARSTATMC electrochemical workstation (PMC1000), and the charge and discharge test range was 0.01-3.0V.

[0031] State and property characterization of the compound:

[0032] Infrared spectroscopy uses a Thermo Scientific Nicolet iS5 Fourier infrared spectrometer with a scanning range of 700-3500 cm -1 ,See figure 1 , figure 1 (a) FT-IR spectrum of N-CTFs-PPT, ...

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Abstract

The invention provides a preparation method of a 2, 6-diaminopyridine-1, 3, 5-triazine polymer, which comprises the following steps: adding 1.0 equivalent weight of 2, 6-diaminopyridine, 0.5-3.0 equivalent weight of cyanuric chloride and 1.0-20 equivalent weight of alkali into a solvent, heating, reacting for 24-100 hours under the protection of N2, purifying to obtain a polymer, mixing the polymer with conductive carbon black and an adhesive according to a certain weight ratio, and reacting for 1-2 hours under the protection of N2 to obtain the 2, 6-diaminopyridine-1, 3, 5-triazine polymer. Preparing a lithium battery; according to the present invention, the capacity after 1000 cycles at the charge-discharge rate of 200 mAg <-1 > is maintained at 1200 mAhg <-1 > or more, the capacity after 2500 cycles at the charge-discharge rate of 1 Ag <-1 > is not less than 350 mAhg <-1 >, and the material has characteristics of excellent performance and low cost, such that the material is expected to be used in the preparation of the high-performance commercial lithium battery.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a preparation method and application of a 2,6-diaminopyridine-1,3,5-triazine polymer. Background technique [0002] By the end of 2021, soaring oil, natural gas, and coal prices have put mankind under a lot of pressure. In addition, climate change has become more and more severe in recent years, such as scorching heat, annual record high temperatures in the Arctic and abnormal winter weather, all of which indicate that social development has obvious climate problems. The main reason for this is that the depletion of traditional fossil energy and various pollution and greenhouse effects caused by excessive consumption of fossil energy seriously restrict the sustainable development of mankind. At present, all countries feel the imminent threat, and the climate summit also are attracting more and more attention. Therefore, it is of great significance to c...

Claims

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Application Information

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IPC IPC(8): C08G73/06H01M4/60
CPCC08G73/0638H01M4/602Y02E60/10
Inventor 康红卫张伟阳孙丽李志鲲
Owner HUANGHE S & T COLLEGE