Preparation method of single-layer MXene nanosheet/ZIF-67 composite material

A ZIF-67, composite material technology, applied in the fields of materials science and electrochemistry, can solve problems such as limited exploration, and achieve the effect of simple method, easy access, and good cycle stability

Pending Publication Date: 2022-08-05
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the exploration of MOFs as anodes for Li-ion batteries is still very limited

Method used

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  • Preparation method of single-layer MXene nanosheet/ZIF-67 composite material
  • Preparation method of single-layer MXene nanosheet/ZIF-67 composite material
  • Preparation method of single-layer MXene nanosheet/ZIF-67 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of monolayer MXene nanosheet / ZIF-67 composite:

[0044] (1) Take 60ml of hydrochloric acid solution with a concentration of 5.49mg / ml and 1g of lithium fluoride in a plastic container at 35°C and stir for 15min to dissolve to form hydrofluoric acid;

[0045] (2) 1g of titanium aluminum carbide (Ti 3 AlC 2 ) was slowly added to the above solution at the same temperature, and the aluminum layer was peeled off by etching for 48h;

[0046] (3) the reaction solution is centrifuged 6 times, the first 5 times of centrifugal rotation speed are 3500rpm, and the time is 5min, and the last centrifugal rotation speed is 5000rpm, and the time is 30min, and freeze-drying is obtained to obtain Ti 3 C 2 MXene;

[0047] (4) 400mg Ti 3 C 2 MXene was dispersed in 40 ml of deionized water, and ultrasonically treated at 30 kHz for 7 h at 5 °C under nitrogen atmosphere to obtain monolayer Ti 3 C 2 MXene solution;

[0048] (5) 20ml monolayer Ti 3 C 2 The MXene solut...

Embodiment 2

[0054] Preparation of monolayer MXene nanosheet / ZIF-67 composite:

[0055] (1) Take 60ml of hydrochloric acid solution with a concentration of 5.49mg / ml and 1g of lithium fluoride in a plastic container at 35°C and stir for 15min to dissolve to form hydrofluoric acid;

[0056] (2) 1g of titanium aluminum carbide (Ti 3 AlC 2 ) was slowly added to the above solution at the same temperature, and the aluminum layer was peeled off by etching for 48h;

[0057] (3) the reaction solution is centrifuged 6 times, the first 5 times of centrifugal rotation speed are 3500rpm, and the time is 5min, and the last centrifugal rotation speed is 5000rpm, and the time is 30min, and freeze-drying is obtained to obtain Ti 3 C 2 MXene;

[0058] (4) 400mg Ti 3 C 2 MXene was dispersed in 40 ml of deionized water, and ultrasonically treated at 30 kHz for 7 h at 5 °C under nitrogen atmosphere to obtain monolayer Ti 3 C 2 MXene solution;

[0059] (5) 20ml monolayer Ti 3 C 2 The MXene soluti...

Embodiment 3

[0062] Preparation of monolayer MXene nanosheet / ZIF-67 composite:

[0063] (1) Take 60ml of hydrochloric acid solution with a concentration of 5.49mg / ml and 1g of lithium fluoride in a plastic container at 35°C and stir for 15min to dissolve to form hydrofluoric acid;

[0064] (2) 1g of titanium aluminum carbide (Ti 3 AlC 2 ) was slowly added to the above solution at the same temperature, and the aluminum layer was peeled off by etching for 48h;

[0065] (3) the reaction solution is centrifuged 6 times, the first 5 times of centrifugal rotation speed are 3500rpm, and the time is 5min, and the last centrifugal rotation speed is 5000rpm, and the time is 30min, and freeze-drying is obtained to obtain Ti 3 C 2 MXene;

[0066] (4) 400mg Ti 3 C 2 MXene was dispersed in 40 ml of deionized water, and ultrasonically treated at 30 kHz for 7 h at 5 °C under nitrogen atmosphere to obtain monolayer Ti 3 C 2 MXene solution;

[0067] (5) 20ml monolayer Ti 3 C 2 The MXene soluti...

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Abstract

The invention relates to a preparation method of a single-layer MXene nanosheet/ZIF-67 composite material, which comprises the following steps: (1) stirring and dissolving a hydrochloric acid solution and lithium fluoride in a container to form hydrofluoric acid, slowly adding titanium aluminum carbide into the solution, and etching and stripping an aluminum layer; (2) centrifuging and drying the reaction liquid to obtain MXene; (3) dispersing Ti < 3 > C < 2 > MXene in deionized water, and performing ultrasonic treatment for a period of time at low temperature to obtain a single-layer Ti < 3 > C < 2 > MXene solution; and (4) growing ZIF-67 on MXene through an in-situ growth method, and sequentially centrifuging and calcining the composite material precursor. Compared with the prior art, the preparation method is environment-friendly, the preparation process is simple and easy to operate, industrial production is facilitated, and the preparation method has a wide application prospect in the field of lithium batteries.

Description

technical field [0001] The invention belongs to the field of material science and electrochemical technology, and particularly relates to a preparation method of a single-layer MXene nanosheet / ZIF-67 composite material. Background technique [0002] In recent years, with the rapid development of science and technology, great progress has been made in many fields such as electric vehicles and artificial intelligence. At the same time, higher requirements are placed on the energy density, rate capability and cycle life of energy storage devices. Among the numerous energy storage devices, commercial lithium-ion batteries are considered to be one of the most promising energy storage devices to meet the growing demand. At present, the main obstacle to the development of lithium-ion batteries is the theoretical capacity of 372mah g -1 graphite anode. To effectively improve the performance of Li-ion batteries, finding new materials to replace graphite anodes is an essential appr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08K3/14H01M4/36H01M4/58C01B32/921
CPCC08G83/008C08K3/14H01M4/362H01M4/58C01B32/921C08K2201/011Y02E60/10
Inventor 蔺华林罗宇孔玥陈永恒张文轩陈江梅黄燕山
Owner SHANGHAI INST OF TECH
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