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Method for preparing 3D printing Nb2CTx/rGO composite sodium metal negative electrode

A 3D printing, sodium metal technology, applied in non-metallic elements, chemical instruments and methods, carbon compounds, etc., can solve problems such as difficulty in wide application, and achieve the effects of accelerating sodium ion transmission, reducing raw material loss, and inhibiting re-accumulation.

Active Publication Date: 2022-08-05
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from the above that the existing

Method used

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  • Method for preparing 3D printing Nb2CTx/rGO composite sodium metal negative electrode
  • Method for preparing 3D printing Nb2CTx/rGO composite sodium metal negative electrode
  • Method for preparing 3D printing Nb2CTx/rGO composite sodium metal negative electrode

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Experimental program
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Effect test

Embodiment 1

[0035] see Figure 1-Figure 7 , a method for preparing 3D printed Nb 2 CT x The method for compounding sodium metal negative electrode with / rGO, the method comprises the following steps:

[0036] Step 1: The GO dispersion was prepared by the modified Hummer method. For the above liquid and Nb 2 CT x The solution was mixed, stirred and centrifuged at low temperature, and the black gel at the bottom of the centrifuge tube was ground to obtain Nb 2 CT x / GO composite ink;

[0037] Step 2: The Nb obtained in step 1 2 CT x The / GO composite ink is transferred into the syringe barrel at a certain pressure, and the direct-writing 3D printing technology is used to print a three-dimensional ordered porous structure layer by layer through the needle tip. 2 CT x / GO composite three-dimensional ordered porous structure was freeze-dried;

[0038] Step 3: Freeze-dried Nb in step 2 2 CT x / GO composite 3D ordered porous structure was moved into a tube furnace for high temperatur...

Embodiment 2

[0049] see Figure 1-Figure 7 , a method for preparing 3D printed Nb 2 CT x The method for compounding sodium metal negative electrode with / rGO, the method comprises the following steps:

[0050] Step 1: The GO dispersion was prepared by the modified Hummer method. 2 CT x solution and 0.1% ZnSO 4 ·7H 2 The O solution was mixed, stirred and centrifuged at low temperature, and the black gel at the bottom of the centrifuge tube was ground to obtain Nb 2 CT x / GO composite ink; in this process, in Nb 2 CT x Zn was introduced into the solution 2+ , destroys Nb 2CT x Electrostatic repulsion between nanosheets to form stable 3D Nb 2 CT x hydrogels that effectively inhibit Nb 2 CT x Repacking of nanosheets. At the same time, it is beneficial to increase the Nb content inside the material. 2 CT x The degree of association between nanosheets, graphene nanosheets, and then 3D printing Nb 2 CT x The strength of the / rGO composite aerogel electrode is improved;

[005...

Embodiment 3

[0057] see Figure 1-Figure 7 , a method for preparing 3D printed Nb 2 CT x The method for compounding sodium metal negative electrode with / rGO, the method comprises the following steps:

[0058] Step 1: The GO dispersion was prepared by the modified Hummer method. 2 CT x solution and 0.3% ZnSO 4 ·7H 2 The O solution was mixed, stirred and centrifuged at low temperature, and the black gel at the bottom of the centrifuge tube was ground to obtain Nb 2 CT x / GO composite ink; in this process, in Nb 2 CT x Zn was introduced into the solution 2+ , destroys Nb 2 CT x Electrostatic repulsion between nanosheets to form stable 3D Nb 2 CT x hydrogels that effectively inhibit Nb 2 CT x Repacking of nanosheets. At the same time, it is beneficial to increase the Nb content inside the material. 2 CT x The degree of association between nanosheets, graphene nanosheets, and then 3D printing Nb 2 CT x The strength of the / rGO composite aerogel electrode is improved;

[00...

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Abstract

The invention is suitable for the technical field of new energy batteries, and provides a method for preparing a 3D printing Nb2CTx / rGO composite sodium metal negative electrode, and the method comprises the following steps: preparing a GO dispersion liquid by adopting a Hummer method, mixing the GO dispersion liquid with an Nb2CTx solution and a ZnSO4. 7H2O solution, stirring, and carrying out centrifugal treatment to obtain Nb2CTx / GO composite ink; transferring into an injector barrel, printing a three-dimensional ordered porous structure by adopting a 3D printing technology, and freeze-drying; the treated Nb2CTx / GO composite three-dimensional ordered porous structure is subjected to annealing, and the 3D printing Nb2CTx / rGO composite aerogel is obtained; putting into a button cell, and discharging; the button cell is disassembled, and the 3D printing Nb2CTx / rGO composite sodium metal negative electrode is obtained.The 3D printing Nb2CTx / rGO composite sodium metal negative electrode is combined with the 3D printing technology and has the advantages that raw materials are saved, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of new energy batteries, in particular to the preparation of 3D printing Nb 2 CT x / rGO composite sodium metal anode method. Background technique [0002] Currently, rechargeable batteries are used in a wide range of applications, such as mobile phones, laptops, electric or hybrid vehicles, and are ubiquitous in everyone's life. Especially in the field of electric vehicles, in order to eliminate the dependence on traditional fossil fuels in the future, it is urgent to develop a battery with high energy density and high cycle stability. Since the 1990s, lithium battery technology has been widely used due to its high energy density and cycle stability. However, the growing demand for lithium resources has put increasing pressure on the supply chain related to lithium resources, and lithium ions are generally stored in politically and economically unstable regions, and extraction is expensive, complicated, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38B82Y30/00B82Y40/00C01B32/184C01B32/914H01M4/62H01M10/054
CPCC01B32/914C01B32/184B82Y40/00B82Y30/00H01M4/381H01M4/625H01M10/054C01P2004/80C01P2006/40H01M2004/027Y02E60/10
Inventor 王烨刘月月杨浩远许婷婷孔德志李新建
Owner ZHENGZHOU UNIV