Preparation and application of covalent organic skeleton/titanium carbide nano-sheet composites

A technology of covalent organic framework and composite materials, which is applied in the preparation of covalent organic framework/Ti3C2 nanosheet composite materials and the preparation of electrode materials, can solve the problems of unstable structure, complicated process and high safety requirements, and achieve Improve the effect of poor electrical conductivity, simple preparation process, and increase sulfur loading capacity

Active Publication Date: 2019-01-18
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Then during the preparation of composite materials, Ti 3 C 2 And CNTs, PDA, RGO are only physically compounded by simple mechanical stirring of the two materials, and the structure is not very stable; while Ti 3 C 2 / MoS 2 / C ternary composite materials need to be in N 2 and NH 3 Prepared by high temperature annealing, the process is more complicated, and the safety requirements are high

Method used

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  • Preparation and application of covalent organic skeleton/titanium carbide nano-sheet composites
  • Preparation and application of covalent organic skeleton/titanium carbide nano-sheet composites
  • Preparation and application of covalent organic skeleton/titanium carbide nano-sheet composites

Examples

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Comparison scheme
Effect test

Embodiment 1

[0026] A covalent organic framework / Ti 3 C 2 The preparation of nanosheet composite material and its application in lithium-sulfur battery adopt the following steps:

[0027] (1) First use 0.5g LiF and 6mol / L HCl to dissolve Ti 3 AlC 2 (MAX) etch to get Ti 3 C 2 Accordion sample followed by Ti 3 C 2 Ultrasonic in water to obtain single-layer or few-layer Ti 3 C 2 Nanosheets were freeze-dried, and their transmission electron microscope pictures are as follows: figure 1 As shown, the Ti prepared by the present invention 3 C 2 The nanosheets are thin and transparent, indicating fewer layers;

[0028] (2) the solid Ti prepared by step (1) 3 C 2 Nanosheet 200mg, terephthalonitrile 20mg, catalyst ZnCl 2 10mg (the mass ratio of the three is 10:1:0.5) is sealed in a vacuum quartz tube, reacted at a high temperature of 400°C for 10h, and cooled to room temperature after the reaction to obtain a black agglomerated material;

[0029] (3) Stir the black agglomerate materia...

Embodiment 2

[0032] A covalent organic framework / Ti 3 C 2 The preparation of nanosheet composite material and its application in lithium-sulfur battery adopt the following steps:

[0033] (1) First use 0.5g LiF and 6mol / L HCl to dissolve Ti 3 AlC 2 (MAX) etch to get Ti 3 C 2 Accordion sample followed by Ti 3 C 2 Ultrasonic in water to obtain single-layer or few-layer Ti 3 C 2 nanosheets and lyophilize them;

[0034] (2) the solid Ti prepared by step (1) 3 C 2 Nanosheet 20mg, 4,4'-biphenyldinitrile 200mg, catalyst ZnCl 2 200mg (the mass ratio of the three is 1:10:10) is sealed in a vacuum quartz tube, reacted at a high temperature of 700°C for 40h, and cooled to room temperature after the reaction to obtain a black agglomerated material;

[0035] (3) Stir the black agglomerate material prepared in step (2) in water for 10 h, then in dilute hydrochloric acid for 20 h, then alternately filter in tetrahydrofuran and distilled water, and vacuum dry to prepare the covalent organic fr...

Embodiment 3

[0039] A covalent organic framework / Ti 3 C 2 The preparation of nanosheet composite material and its application in lithium-sulfur battery adopt the following steps:

[0040] (1) First use 0.5g LiF and 6mol / L HCl to dissolve Ti 3 AlC 2 (MAX) etch to get Ti 3 C 2 Accordion sample followed by Ti 3 C 2 Ultrasonic in water to obtain single-layer or few-layer Ti 3 C 2 nanosheets and lyophilize them;

[0041] (2) the solid Ti prepared by step (1) 3 C 2 Nanosheet 20mg, Terephthalonitrile 20mg, Catalyst ZnCl 2 200mg (the mass ratio of the three is 1:1:10) is sealed in a vacuum quartz tube, reacted at a high temperature of 400°C for 40h, and cooled to room temperature after the reaction to obtain a black agglomerated material;

[0042] (3) Stir the black agglomerate material prepared in step (2) in water for 24 hours, then in dilute hydrochloric acid for 24 hours, then alternately filter in tetrahydrofuran and distilled water, and vacuum dry to prepare the covalent organic...

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Abstract

The invention relates to the preparation and application of a covalent organic skeleton / titanium carbide nano-sheet composite material, and belongs to the technical field of development and research of new energy materials. The Ti3C2 nano-sheets with single layer or few layers are mixed with organic monomer and solid catalyst and sealed in a vacuum quartz tube, and a covalent organic skeleton / Ti3C2 nano-sheet composite material is obtained by the ionothermal method. The covalent organic skeleton / Ti_3C_2 nanocomposite was coated on aluminum as working electrode after carrying sulfur, lithium metal is used as counter electrode and reference electrode, organic microporous membrane is used as separator, organic solution is used as electrolyte, and a button cell is assembled in the glove box filled with high purity argon. Compared with the prior art, the present invention can be used as a two-dimensional electrode material, is widely used in the energy field such as lithium sulfide batteryand the like, and has excellent charging / discharging performance.

Description

technical field [0001] The invention relates to a preparation method and application of an electrode material, in particular to a covalent organic framework / Ti 3 C 2 The preparation method of nanosheet composite material and its application in lithium-sulfur batteries belong to the technical field of development and research of new energy materials. Background technique [0002] Lithium-ion batteries are the main energy storage batteries widely used in today's society, and their stable power output and good battery life make them suitable for the energy needs of portable electronic devices. However, with the continuous depletion of fossil energy and the increasing emphasis on ecological and environmental protection, social development has an increasing demand for rechargeable vehicles and large-scale new power grids. New batteries with low cost, high specific energy density and long cycle life The research and development of equipment has become the key to the field of ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/60H01M4/583H01M4/38H01M10/052B82Y30/00
CPCB82Y30/00H01M4/362H01M4/38H01M4/583H01M4/60H01M10/052Y02E60/10
Inventor 杨金虎孟瑞晋杨仔仪徐梦竹黄继梅陈炳杰
Owner TONGJI UNIV
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