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Sandwich structure composite material and preparation method and application thereof

A composite material and sandwich technology, used in structural parts, chemical instruments and methods, carbon compounds, etc., can solve problems such as electrical conductivity damage, and achieve the effects of improving stability, improving ion transport capacity, and increasing electrochemical reaction area.

Inactive Publication Date: 2020-11-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the abundance of end groups, it has better fusion with different solvents, but the existence of end groups will also damage its conductivity.

Method used

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  • Sandwich structure composite material and preparation method and application thereof
  • Sandwich structure composite material and preparation method and application thereof
  • Sandwich structure composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 2g of Nb 2 AlC was crushed into smaller particles by ball milling for 30 minutes and selectively etched with 40% HF, and the mixture was stirred for 24 hours and centrifuged at a speed of 4000 rpm. Collect the precipitate and wash repeatedly until the pH value of the supernatant is 6-7. Nb was obtained after drying 2 c. Then Nb 2 C was dispersed into a large amount of deionized water and argon gas was continuously injected for ultrasonic dispersion, and the temperature was kept at 25 °C. The solution was then centrifuged at 3500 rpm for 1 hour. Collect the upper liquid state, that is, MXeneNb with fewer layers 2 C colloidal solution. 1.55 mg of nitrogen-doped carbon nanotubes (N-CNT) prepared by chemical vapor deposition and 0.25 g of cetyltrimethylammonium bromide (CTAB) were mixed into 30 ml of deionized water and stirred and ultrasonically dispersed for 30 min. Then 3 mL of 5 mg / mL Nb 2 C colloidal solution was added dropwise to the mixture and sonicated for ...

Embodiment 2

[0053] 2g of Nb 2 AlC was crushed into smaller particles by ball milling for 30 minutes and selectively etched with 40% HF, and the mixture was stirred for 24 hours and centrifuged at a speed of 4000 rpm. Collect the precipitate and wash repeatedly until the pH value of the supernatant is 6-7. Nb was obtained after drying 2 c. Then Nb 2 C was dispersed into a large amount of deionized water and argon gas was continuously injected for ultrasonic dispersion, and the temperature was kept at 25 °C. The solution was then centrifuged at 3500 rpm for 1 hour. Collect the upper liquid state, that is, MXeneNb with fewer layers 2 C colloidal solution. 1.55 mg of nitrogen-doped carbon nanotubes (N-CNT) prepared by chemical vapor deposition and 0.25 g of cetyltrimethylammonium bromide (CTAB) were mixed into 27 ml of deionized water and stirred and ultrasonically dispersed for 30 min. Then 3 mL of 5 mg / mL Nb 2 C colloidal solution was added dropwise to the mixture and sonicated for ...

Embodiment 3

[0055] 2g of Nb 2 AlC was crushed into smaller particles by ball milling for 30 minutes and selectively etched with 40% HF, and the mixture was stirred for 24 hours and centrifuged at a speed of 4000 rpm. Collect the precipitate and wash repeatedly until the pH value of the supernatant is 6-7. Nb was obtained after drying 2 c. Then Nb 2 C was dispersed into a large amount of deionized water and argon gas was continuously injected for ultrasonic dispersion, and the temperature was kept at 25 °C. The solution was then centrifuged at 3500 rpm for 1 hour. Collect the upper liquid state, that is, MXeneNb with fewer layers 2C colloidal solution. 1.8 mg of nitrogen-doped carbon nanotubes (N-CNT) prepared by chemical vapor deposition and 0.25 g of cetyltrimethylammonium bromide (CTAB) were mixed into 30 ml of deionized water and stirred and ultrasonically dispersed for 30 min. Then 3 mL of 5 mg / mL Nb 2 C colloidal solution was added dropwise to the mixture and sonicated for 1 ...

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Abstract

The invention relates to a sandwich structure composite material as well as a preparation method and application thereof. The composite material comprises Nb2C and nitrogen-doped carbon nanotubes (N-CNTs), the Nb2C is in a two-dimensional organ shape, and the N-CNTs are clamped between Nb2C lamellas. The conductivity of Nb2C is improved. With the insertion of the N-CNT, the stacking between Nb2C lamellar structures is avoided, the ion transmission capacity of Nb2C is improved by the N-CNTs, and the electrochemical reaction area is increased. The preparation method comprises the following steps: etching Nb2AlC to obtain Nb2C; dispersing Nb2C into water to obtain an Nb2C colloidal solution; and mixing the NCNT solution and the Nb2C colloidal solution, and carrying out a self-assembly reaction to obtain the sandwich structure composite material. And the electrical property is excellent.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, and in particular relates to a sandwich structure composite material and a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Energy storage devices such as batteries play an important role in mobile devices. Alkali metal ion batteries, including lithium, sodium, and potassium ion batteries, have been extensively studied as rechargeable batteries. Their energy storage mechanism is similar to rocking chair batteries, in which lithium, sodium, and potassium ions are continuously inserted and extracted at both ends of the positive and negative...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M10/0525H01M10/054C01B32/914C01B32/168
CPCC01B2202/22C01P2002/72C01P2004/04C01P2004/20C01P2006/40C01B32/168C01B32/914H01M4/366H01M4/583H01M4/625H01M10/0525H01M10/054H01M2004/021H01M2004/028Y02E60/10
Inventor 张建新张文扬金辉鑫张友健杜逸群王子晗
Owner SHANDONG UNIV
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