Preparation method of positive electrode material with high adsorption catalytic performance of lithium-sulfur battery

A technology of catalytic performance and positive electrode materials, applied in the direction of battery electrodes, lithium batteries, positive electrodes, etc., can solve the problems that are not enough to completely improve the shuttle effect of polysulfides, weak physical interactions, etc.

Active Publication Date: 2021-07-16
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the physical interaction between non-polar carbon materials and polar polysulfides is only weak, which is not enough to completely improve the shuttling effect of polysulfides.

Method used

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  • Preparation method of positive electrode material with high adsorption catalytic performance of lithium-sulfur battery
  • Preparation method of positive electrode material with high adsorption catalytic performance of lithium-sulfur battery
  • Preparation method of positive electrode material with high adsorption catalytic performance of lithium-sulfur battery

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Experimental program
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Effect test

Embodiment 1

[0026] The preparation method of the positive electrode material with high adsorption and catalytic performance of the lithium-sulfur battery comprises the following steps:

[0027] (1) Preparation of silica sphere dispersion: adopt sol-gel method: add tetraethyl orthosilicate to the mixed solution of catalyst and alcohol solvent, and react to prepare nano-silica spheres;

[0028] (2) Preparation of highly uniform ethanol solution of phenolic resin: using aldehyde-phenol addition reaction: synthesized by phenol, formaldehyde and sodium hydroxide;

[0029] (3) Preparation of SiO 2 / AAO double template: put 1 piece of AAO template in 5mL of the silica sphere dispersion obtained in step (1), let it stand for 4 days, and then dry it naturally to obtain SiO 2 / AAO double template;

[0030] (4) Preparation of Ta / CNW: First, 100 μL of tantalum ethoxide, 500 μL of phenolic resin and 2 mL of absolute ethanol were sonicated to form a mixed solution, and then the SiO obtained in step (...

Embodiment 2

[0036] The preparation method of the positive electrode material with high adsorption and catalytic performance of the lithium-sulfur battery comprises the following steps:

[0037] (1) Preparation of silica sphere dispersion: adopt sol-gel method: add tetraethyl orthosilicate to the mixed solution of catalyst and alcohol solvent, and react to prepare nano-silica spheres;

[0038] (2) Preparation of highly uniform ethanol solution of phenolic resin: using aldehyde-phenol addition reaction: synthesized by phenol, formaldehyde and sodium hydroxide;

[0039] (3) Preparation of SiO 2 / AAO double template: put 1 piece of AAO template in 5mL of the silica sphere dispersion obtained in step (1), let it stand for 4 days, and then dry it naturally to obtain SiO 2 / AAO double template;

[0040] (4) Preparation of Ta / CNW: First, 50 μL of tantalum ethoxide, 200 μL of phenolic resin and 1 mL of absolute ethanol were ultrasonically formed into a mixed solution, and then the SiO obtained i...

Embodiment 3

[0043] The preparation method of the positive electrode material with high adsorption and catalytic performance of the lithium-sulfur battery comprises the following steps:

[0044] (1) Preparation of silica sphere dispersion: adopt sol-gel method: add tetraethyl orthosilicate to the mixed solution of catalyst and alcohol solvent, and react to prepare nano-silica spheres;

[0045] (2) Preparation of highly uniform ethanol solution of phenolic resin: using aldehyde-phenol addition reaction: synthesized by phenol, formaldehyde and sodium hydroxide;

[0046] (3) Preparation of SiO 2 / AAO double template: put 1 piece of AAO template in 5mL of the silica sphere dispersion obtained in step (1), let it stand for 4 days, and then dry it naturally to obtain SiO 2 / AAO double template;

[0047] (4) Preparation of Ta / CNW: First, 200 μL of tantalum ethoxide, 800 μL of phenolic resin and 3 mL of absolute ethanol were sonicated to form a mixed solution, and then the SiO obtained in step (...

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Abstract

The invention belongs to the technical field of lithium-sulfur batteries, and relates to a preparation method of a positive electrode material with high adsorption catalytic performance of a lithium-sulfur battery. The preparation method comprises the following steps of: (1) preparing a silicon dioxide sphere dispersion liquid by adopting a sol-gel method; (2) preparing a highly-uniform phenolic resin ethanol solution through carrying out an aldehyde-phenol addition reaction; (3) preparing SiO2/AAO double templates; (4) preparing Ta/CNW; and (5) preparing S@ Ta/CNW.

Description

technical field [0001] The invention belongs to the technical field of lithium-sulfur batteries, and in particular relates to a preparation method of a positive electrode material with high adsorption and catalytic performance for lithium-sulfur batteries. Background technique [0002] With the rapid development of society, the growth of global population, the depletion of fossil fuels and the huge environmental problems caused by traditional fossil energy, human beings have an urgent need for energy and sustainable new energy. The new energy industry, such as nuclear energy, wind energy, solar energy and other renewable energy, has achieved rapid and continuous development. Since the new energy industry generally faces seasonal and periodic characteristics, it often needs to be stored first and then distributed, so the development of energy storage equipment is directly Restricted the development speed of the new energy industry. In order to meet the challenges of energy c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/62H01M10/052
CPCH01M4/38H01M4/625H01M4/626H01M10/052H01M2004/028Y02E60/10
Inventor 王新王文娟韦小玲
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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