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A kind of MOF-derived nanosheet intercalation material, its preparation method and its application

A technology of intercalation materials and nanosheets, which is applied in the field of MOF-derived nanosheet intercalation materials and preparation, can solve the problems of limited popularization and application, and the capacitance of electric double-layer supercapacitors is not as good.

Active Publication Date: 2021-02-26
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the capacitance of electric double layer supercapacitors is far inferior to that of pseudocapacitor supercapacitors, which limits the popularization and application of this material.

Method used

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  • A kind of MOF-derived nanosheet intercalation material, its preparation method and its application
  • A kind of MOF-derived nanosheet intercalation material, its preparation method and its application
  • A kind of MOF-derived nanosheet intercalation material, its preparation method and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Add 0.115g of cobalt acetate and 4.4g of benzimidazole (bim) into 85ml of analytically pure toluene and 75ml of analytically pure methanol mixed solvent, and then add 15ml of analytically pure ammonia as an auxiliary agent. Ultrasonic the above prepared solution for 5 minutes, heat and stir at 60°C for 12 hours, after the reaction, cool to room temperature, wash with distilled water and ethanol respectively;

[0030] (2) 100mg of Co 2 (bim) 4 Put it in a covered crucible, heat up to 350°C in a muffle furnace at a heating rate of 2.3°C / min, and keep it for 4 hours. The black powder obtained after natural cooling is porous cobalt tetraoxide nanosheets;

[0031] (3) Disperse 50 mg of porous cobalt trioxide nanosheets and 50 mg of polyethyleneimine (PEI, molecular weight: 600) in 1 g of deionized water, put it into a freeze dryer for 1 h after ultrasonication, and freeze-dry it for one day, and then dry it at 2 °C / min The heating rate was increased to 800 ° C for 4 h ...

Embodiment 2～ Embodiment 6

[0034] Each embodiment is identical with embodiment 1, and its difference is as shown in table 1:

[0035] Table 1

[0036]

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Abstract

The invention discloses a MOF-derived nanosheet intercalation material and its preparation method and application. The preparation includes: (1) heating, mixing and stirring cobalt acetate, benzimidazole, methanol and toluene solutions, and adding ammonia water to obtain two-dimensional MOF nanosheets co 2 bim 4 , washed with ultrapure water and ethanol, and then dried at 80°C for 24 h; (2) heating the obtained purple powder to 350°C at a heating rate of 1°C / min and calcining in air atmosphere for 3 h to prepare porous cobalt trioxide nanosheets; (3) Disperse the porous cobalt trioxide nanosheets and polyethyleneimine in water, stir at room temperature for one hour, freeze-dry for 24 h, and then raise the temperature to 600-900 °C under argon or nitrogen atmosphere at a heating rate of 2 °C / min. Calcined at ℃ for 4 h to obtain the MOF-derived nanosheet intercalation material, that is, porous tricobalt tetroxide nanosheet-nitrogen-doped carbon composite airgel; it is prepared into an electrode sheet and applied in a supercapacitor, showing a specific capacitance as high as 2251F / g, and With good rate characteristics, it is a very potential supercapacitor material.

Description

technical field [0001] The invention relates to a method for synthesizing a covalent organic framework film, in particular to a MOF-derived nanosheet intercalation material, a preparation method and an application thereof. Background technique [0002] With the rapid development of the global economy, the rapid consumption of petroleum and coal, and the deteriorating environmental pollution problems have forced people to develop more efficient, clean, sustainable energy and new technologies for energy conversion and storage. In recent years, the development and utilization of various green energy technologies and clean and renewable new energy technologies have received extensive attention, such as electric energy, wind energy, solar energy, and tidal energy. [0003] Supercapacitors are a new type of energy storage element between ordinary capacitors and batteries. They have the advantages of wide operating temperature range (-20°C to 60°C), short charging time, high output...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/46H01G11/48H01G11/86
CPCH01G11/24H01G11/30H01G11/32H01G11/46H01G11/48H01G11/86Y02E60/13
Inventor 黄爱生刘传耀岳文哲于华峥刘嘉琴陈芳格郭浩
Owner EAST CHINA NORMAL UNIV