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Triazine covalent organic framework material rich in allyloxy as well as preparation method and application of triazine covalent organic framework material

A covalent organic framework and allyloxy technology, which is applied in the preparation of triazine covalent organic framework and the application field of lithium-sulfur battery cathode materials, can solve the problems of lack of research and low density

Active Publication Date: 2021-09-14
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the special structural properties of this material, such as low density, high thermal stability, and large specific surface area, this material has been widely used in the fields of gas adsorption, catalysis, energy storage, and photoelectric conversion. Covalent organic framework materials, research in related fields is still very scarce

Method used

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  • Triazine covalent organic framework material rich in allyloxy as well as preparation method and application of triazine covalent organic framework material
  • Triazine covalent organic framework material rich in allyloxy as well as preparation method and application of triazine covalent organic framework material
  • Triazine covalent organic framework material rich in allyloxy as well as preparation method and application of triazine covalent organic framework material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Preparation of allyloxy-triazine covalent organic framework material: 142 mg (ie 0.75 mmol) of 5-(allyloxy) isophthalaldehyde and 177 mg (ie 0.5 mmol) of 4,4 ',4"-(1,3,5-triazine-2,4,6-triyl)triphenylamine was placed in a 100ml thick-walled pressure bottle, vacuumed, filled with argon, and 60ml of 1,4 - Dioxane, 12 ml 1,3,5-trimethylbenzene and 5 ml glacial acetic acid, sonicated for 5 minutes to fully dissolve, three cycles of liquid nitrogen freezing (each cycle including "freeze-thaw" Steps, the freezing is freezing at liquid nitrogen -196°C for 5 minutes, thawing is standing for 15 minutes under natural conditions and returning to room temperature), filling with argon, heating to 120°C in an oil bath, and constant temperature reaction for 3 day, cooled, filtered, the solid was repeatedly washed with absolute ethanol, and washed with acetone for 24 hours, and dried in vacuum at 60°C for 6 hours to obtain the covalent organic framework ART-COF, the infrared spectr...

Embodiment 2

[0045] Other steps are the same as in Example 1, except that the constant temperature reaction time is replaced by 5 days by 3 days.

Embodiment 3

[0047] Other steps are the same as in Example 1, except that 150 mg of sublimed sulfur powder is replaced by 175 mg.

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Abstract

The invention relates to a triazine covalent organic framework material rich in allyloxy as well as a preparation method and application of the triazine covalent organic framework material. The material is formed by continuously splicing 5-allyloxy isophthalaldehyde and 4,4',4''-(1,3,5-triazin-2,4,6-triyl)triphenylamine through a condensation reaction, and the unit structural formula of the material is shown in the specification. According to the preparation method, aldehyde with an allyloxy group and amine with a triazine group are subjected to a traditional Schiff base reaction, and synthesis of the covalent organic framework material arranged in order is achieved. The material obtained by the invention has an allyloxy group and a triazine group, can significantly improve the cycle performance of the lithium-sulfur battery, and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of positive electrode composite materials for lithium-sulfur batteries, and in particular relates to a preparation method of an allyloxy-rich triazine covalent organic framework and its application in lithium-sulfur battery positive electrode materials. Background technique [0002] The global energy crisis and environmental issues have stimulated the development of energy storage technologies with low carbon emissions, and advanced energy storage technologies are crucial to future societies and sustainable economies. Lithium-ion batteries are state-of-the-art rechargeable batteries based on intercalated lithium, by using lithium transition metal oxides as cathode materials, however, their theoretical specific capacity and specific energy are low, which cannot meet people's daily needs. In addition, the cost of producing lithium-ion batteries is high. Therefore, the development of new high energy densi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/08H01M4/13H01M4/38H01M4/62H01M10/052
CPCC08G12/08H01M4/628H01M4/38H01M4/13H01M10/052H01M2004/028Y02E60/10
Inventor 古国贤李明凯王英明孙树政杨延琴张自生郭宏飞
Owner HEBEI UNIV OF TECH
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