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A preparation method of a cathode material with high adsorption and catalytic performance for a lithium-sulfur battery

A technology of catalytic performance and positive electrode material, applied in battery electrodes, lithium storage batteries, positive electrodes, etc., can solve the problems of insufficiently improving the shuttle effect of polysulfides and weak physical interactions.

Active Publication Date: 2022-04-26
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A preparation method of a cathode material with high adsorption and catalytic performance for a lithium-sulfur battery
  • A preparation method of a cathode material with high adsorption and catalytic performance for a lithium-sulfur battery
  • A preparation method of a cathode material with high adsorption and catalytic performance for a lithium-sulfur battery

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Comparison scheme
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 in particular relates to a preparation method of a positive electrode material with high adsorption and catalytic performance for lithium-sulfur batteries. The preparation method of the positive electrode material with high adsorption and catalytic performance of the lithium-sulfur battery comprises the following steps: (1) preparing a silica sphere dispersion liquid: adopting a sol-gel method; (2) preparing a highly uniform phenolic resin ethanol solution: adopting aldehyde phenol Addition reaction; (3) Preparation of SiO 2 / AAO dual template; (4) preparation of Ta / CNW; (5) preparation of 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 Patents(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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