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Heteroatom-containing covalent organic framework electrode material and preparation method and application thereof

A covalent organic framework and electrode material technology, applied in the direction of negative electrodes, battery electrodes, active material electrodes, etc., can solve the problems of poor conductivity, reduce interface resistance, increase conductivity, and prevent aggregation

Pending Publication Date: 2020-09-18
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of layer-by-layer stacking structure and poor conductivity of two-dimensional covalent organic framework materials, the present invention provides a heteroatom-containing covalent organic framework electrode material, its preparation method and application. Covalent organic framework materials, obtained heteroatom-containing few-layer organic composite materials, applied to lithium-ion battery electrode materials

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  • Heteroatom-containing covalent organic framework electrode material and preparation method and application thereof
  • Heteroatom-containing covalent organic framework electrode material and preparation method and application thereof
  • Heteroatom-containing covalent organic framework electrode material and preparation method and application thereof

Examples

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Embodiment 1

[0036] In this example, a preparation method of a heteroatom-containing covalent organic framework electrode material, a two-dimensional imine-based covalent organic framework material E-SCOF-ICI / CNT loaded with nitrogen-containing heteroatoms on the surface of carbon nanotubes , the steps are as follows:

[0037] a. Dissolve 72 mg of 1,3,5-tris(4-aminophenyl)benzene (TAPB), 40 mg of terephthalaldehyde (PDA), and 40 mg of carbon nanotubes (CNT) in 10.0 mL of 1,4-bis In the mixed solvent of oxane and mesitylene, the volume ratio of 1,4-dioxane and mesitylene solution in the mixed solvent is 4:1, stir for 30min; then add 6.0mg catalyst Sc(OTf)3 and stirred for 1 h to obtain a gray-green solution; finally, wash and centrifuge at least 2 times with methanol and tetrahydrofuran (THF); and dry at 60°C for 24 h to obtain a gray-green SCOF-ICI / CNT powder, thereby obtaining a COF / CNT composite Material;

[0038] b. The above-mentioned COF / CNT composite material is peeled off by mechan...

Embodiment 2

[0047] This embodiment is basically the same as Embodiment 1, and the special feature is that the following synthetic processes are different:

[0048] a. Dissolve 72 mg of 1,3,5-tris(4-aminophenyl)benzene (TAPB), 40 mg of terephthalaldehyde (PDA), and 8 mg of carbon nanotubes (CNT) in 10.0 mL of 1,4-bis In the mixed solvent of oxane and mesitylene, the volume ratio of 1,4-dioxane and mesitylene solution in the mixed solvent is 4:1, stir for 30min; then add 3.0mg catalyst Sc(OTf) 3 and stirred for 1 h to obtain a gray-green solution; finally, wash and centrifuge 3 times with methanol and tetrahydrofuran (THF); and dry at 60°C for 24 h to obtain a gray-green SCOF-ICI / CNT powder, thereby obtaining a COF / CNT composite material ;

[0049] b. The above-mentioned COF / CNT composite material is peeled off by mechanical grinding method to obtain the final heteroatom-containing covalent organic framework electrode material, and 30 mg of COF / CNT composite material is put into a ball mil...

Embodiment 3

[0051] The present embodiment is basically the same as the previous embodiment, and the special feature is the difference in the following synthesis process:

[0052] a. Dissolve 72 mg of 1,3,5-tris(4-aminophenyl)benzene (TAPB), 40 mg of terephthalaldehyde (PDA), and 48 mg of carbon nanotubes (CNT) in 10.0 mL of 1,4-bis In the mixed solvent of oxane and mesitylene, the volume ratio of 1,4-dioxane and mesitylene solution in the mixed solvent is 1:1, stir for 30min; then add 10.0mg catalyst Sc(OTf) 3 and stirred for 1 h to obtain a gray-green solution; finally, wash and centrifuge 3 times with methanol and tetrahydrofuran (THF); and dry at 60°C for 24 h to obtain a gray-green SCOF-ICI / CNT powder, thereby obtaining a COF / CNT composite material ;

[0053] b. The above-mentioned COF / CNT composite material is peeled off by mechanical grinding method to obtain the final heteroatom-containing covalent organic framework electrode material, and 30 mg of COF / CNT composite material is pu...

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Abstract

The invention discloses a heteroatom-containing covalent organic framework electrode material and a preparation method and application thereof, and the electrode material is a composite electrode material prepared by loading a nitrogen heteroatom-containing two-dimensional imino covalent organic framework material on the surface of a carbon nanotube and then carrying out mechanical stripping. Themechanically stripped thin layer structure of the covalent organic nanosheet is used as the negative electrode material of the lithium ion battery, so that more lithium storage active sites can be provided, and the utilization efficiency of the active sites is also improved. Compared with the previously reported covalent organic framework electrode material, the stripped nitrogen heteroatom-containing imino covalent organic nanosheet has large reversible capacity and excellent cycle performance. Meanwhile, the stripped heteroatom-containing covalent organic framework electrode material has theadvantages of simple preparation method, low reaction temperature, unique and novel material and the like, and has certain commercial practical application potential.

Description

technical field [0001] The invention relates to a preparation method of a covalent organic frame electrode material, which belongs to the technical field of lithium ion battery electrode material preparation. Background technique [0002] Rechargeable lithium batteries, with their high energy density, long cycle life, and other excellent performance characteristics, dominate the market for portable electronics. The research on electrode materials for lithium-ion batteries is currently focused on metal electrode materials such as transition metal oxides, transition metal sulfides, and transition metal selenides. However, these transition metal compounds containing cobalt, iron, nickel, manganese, etc. cannot be used indefinitely due to the limitation of resources, and may cause serious environmental problems during the development process. Due to the characteristics of abundant natural resources, wide sources, adjustable structure, various types, low cost, and environmental ...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M4/62H01M10/0525C08G83/00
CPCH01M4/602H01M4/625H01M10/0525C08G83/008H01M2004/021H01M2004/027Y02E60/10
Inventor 王勇孙炜伟吕丽萍陈修栋许娇娇
Owner SHANGHAI UNIV
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