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Irreversible bond connected thin-layer covalent organic framework material as well as preparation method and application thereof

A covalent organic framework, thin-layer technology, applied in structural parts, circuits, electrical components, etc., can solve the problems of long and complicated experimental procedures of few-layer treatment, and achieve good electrochemical lithium storage capacity, excellent chemical stability, simple craftsmanship

Active Publication Date: 2021-06-08
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The experimental lithium storage capacity of thin-layer COFs far exceeds the capacity of similar materials (such as graphite), which proves the great application prospects of thin-layer COFs materials in the field of electrochemical lithium storage, but in the process of obtaining thin-layer COFs materials with stable structures , the experimental procedure of its synthesis, stabilization and few-layer treatment is lengthy and complicated

Method used

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  • Irreversible bond connected thin-layer covalent organic framework material as well as preparation method and application thereof
  • Irreversible bond connected thin-layer covalent organic framework material as well as preparation method and application thereof
  • Irreversible bond connected thin-layer covalent organic framework material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0031] Preparation of thin-layer covalent organic framework materials linked by irreversible bonds

[0032] 2,3,6,7,10,11-hexabromotriphenylene, 2,3,6,7,10,11-hexaaminotriphenylene hexahydrochloride, sodium tert-butoxide, bis(1,5- Cyclooctadiene) rhodium(I) tetrafluoroborate and N,N'-(isopropyl)imidazolium chloride are added to ethylene glycol dimethyl ether at a molar ratio of 1:1.2:14:0.05:0.1, and after mixing React at 120°C for 7 days, then separate the solid from the liquid, wash the solid phase with tetrahydrofuran, methanol and water in turn, pre-dry it at 80°C for 24 hours, and then dry it in vacuum at 150°C to constant weight to obtain an irreversible bond Connected thin-layer covalent organic framework materials.

Embodiment 2

[0034] Preparation of thin-layer covalent organic framework materials linked by irreversible bonds

[0035] 2,3,6,7,10,11-hexabromotriphenylene, 2,3,6,7,10,11-hexaaminotriphenylene hexahydrochloride, potassium tert-butoxide, bis(1,5- Cyclooctadiene) rhodium(I) tetrafluoroborate and N,N'-(isopropyl)imidazolium chloride are added to 1,2-dichlorobenzene at a molar ratio of 1:1.2:7:0.05:0.2, and mixed Afterwards, react at 100°C for 14 days, then separate the solid from the liquid, take the solid phase and wash it with tetrahydrofuran, acetone and water in turn, and then pre-dry it at 100°C for 18 hours, and then vacuum-dry it at 250°C to constant weight to obtain an irreversible Bond-linked thin-layer covalent organic framework materials.

Embodiment 3

[0037] Preparation of thin-layer covalent organic framework materials linked by irreversible bonds

[0038] 2,3,6,7,10,11-hexabromotriphenylene, 2,3,6,7,10,11-hexaaminotriphenylene hexahydrochloride, lithium tert-butoxide, bis(1,5- Cyclooctadiene) rhodium(I) tetrafluoroborate and N,N'-(isopropyl)imidazolium chloride are added to ethylene glycol dimethyl ether at a molar ratio of 1:1.2:7:0.05:0.1, and after mixing React at 150°C for 4 days, then separate the solid from the liquid, wash the solid phase with tetrahydrofuran, methanol and water in turn, pre-dry it at 120°C for 12 hours, and then dry it in vacuum at 400°C to constant weight to obtain an irreversible bond Connected thin-layer covalent organic framework materials.

[0039] figure 1 It is a schematic diagram of the molecular structure of the thin-layer covalent organic framework material connected by an irreversible bond in the present invention. It can be seen that the material is connected and expanded in a two-di...

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Abstract

The invention relates to an irreversible bond connected thin-layer covalent organic framework material as well as a preparation method and application thereof, and belongs to the technical field of organic chemistry. The structural formula of the material shown in the specification. According to the preparation method, 2,3,6,7,10,11-hexabromo-triphenylene, 2,3,6,7,10,11-hexa-amino triphenylene hexachloride, alkali, bis(1,5-cyclo-octadiene) rhodium (I) tetrafluoroborate and N,N'-(isopropyl)imidazole chloride are taken as raw materials, and the framework material is prepared from the raw materials in an organic solvent. All atoms in the thin-layer covalent organic framework material are connected through an irreversible piperazine ring, the thin-layer covalent organic framework material is a crystalline thin-layer COFs nano sheet formed by orderly stacking single-layer COFs, and the thin-layer covalent organic framework material not only has excellent chemical stability, but also has good electrochemical lithium storage capacity and excellent cycle stability. The method provided by the invention can realize one-step synthesis of the covalent organic framework material with crystalline and thin-layer characteristics, and is simple in process, low in equipment requirement and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of organic chemistry, and in particular relates to a thin-layer covalent organic framework material connected by an irreversible bond and a preparation method and application thereof. Background technique [0002] With the consumption of non-renewable energy, the world is inevitably facing a serious energy crisis. The energy conversion between renewable energy such as solar energy and wind energy and electric energy and the development and development of corresponding energy storage devices have attracted extensive attention in the scientific research and industrial circles. Lithium-ion batteries are currently a relatively mature electrochemical energy storage technology. Lithium-ion batteries have high energy density and have been widely used in portable electronic devices. At the same time, lithium-ion batteries also have good application prospects in the field of new energy transportation. In order to m...

Claims

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Application Information

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IPC IPC(8): C08G73/02H01M4/60H01M10/0525
CPCC08G73/026H01M4/606H01M10/0525Y02E60/10
Inventor 刘双翼周瑞李振湖
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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