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Electrode material of lithium battery and preparation method of electrode material

An electrode material and lithium battery technology, applied in battery electrodes, electrode manufacturing, lithium batteries, etc., can solve problems such as cycle performance degradation

Inactive Publication Date: 2021-05-28
深圳名仕堂贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of the electrode material of the lithium battery of the existing lithium sulfur battery due to the shuttle of polysulfides, which causes the cycle performance to continuously decline, and to provide an electrode material of the lithium battery and a preparation method thereof

Method used

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  • Electrode material of lithium battery and preparation method of electrode material
  • Electrode material of lithium battery and preparation method of electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Mix the sulfur carrier and sulfur, the mass of the sulfur is 30% of the mass of the sulfur carrier, and then in the muffle furnace, under the condition of being isolated from the air, at a temperature of 155 ° C, keep warm for 12 hours, and cool with the furnace to Room temperature, discharge, and get the sulfur-loaded cathode material;

[0037] In parts by weight, take 80 parts of sulfur-loaded positive electrode material, 3 parts of conductive carbon black, 4 parts of water-based glue LA133, 20 parts of water, and 40 parts of isopropanol, and first stir and mix the sulfur-loaded positive electrode material and conductive carbon black to form Mix the dry powder, mix the water-based glue LA133, water and isopropanol to form a glue solution, then add the glue solution to the mixed dry powder in 3 batches, knead and stir for 6 hours, and discharge to obtain the positive electrode slurry;

[0038] Then apply the positive electrode slurry on the surface of the current colle...

Embodiment 2

[0043] Mix the sulfur carrier and sulfur, the mass of the sulfur is 35% of the mass of the sulfur carrier, and then in the muffle furnace, under the condition of being isolated from the air, at a temperature of 155 ° C, heat preservation and sulfurization for 14 hours, and cool with the furnace to Room temperature, discharge, get the sulfur-loaded cathode material;

[0044] In parts by weight, take 100 parts of sulfur-loaded positive electrode material, 4 parts of conductive carbon black, 5 parts of water-based glue LA133, 25 parts of water, and 45 parts of isopropanol, and first stir and mix the sulfur-loaded positive electrode material and conductive carbon black to form Mix the dry powder, and mix the water-based glue LA133, water and isopropanol to form a glue solution, then add the glue solution to the mixed dry powder in 3 batches, knead and stir for 7 hours, and discharge to obtain the positive electrode slurry;

[0045]Then apply the positive electrode slurry on the su...

Embodiment 3

[0050] Mix the sulfur carrier and sulfur, the mass of the sulfur is 40% of the mass of the sulfur carrier, and then in the muffle furnace, under the condition of being isolated from the air, at a temperature of 155 ° C, heat preservation and sulfurization for 16 hours, and cool with the furnace to Room temperature, discharge, and get the sulfur-loaded cathode material;

[0051] In parts by weight, take 120 parts of sulfur-loaded positive electrode material, 5 parts of conductive carbon black, 8 parts of water-based glue LA133, 30 parts of water, and 50 parts of isopropanol, and first stir and mix the sulfur-loaded positive electrode material and conductive carbon black to form Mix the dry powder, mix the water-based glue LA133, water and isopropanol to form a glue solution, then add the glue solution to the mixed dry powder in 3 batches, knead and stir for 8 hours, and discharge to obtain the positive electrode slurry;

[0052] Then apply the positive electrode slurry on the s...

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Abstract

The invention belongs to the technical field of lithium batteries, and particularly relates to an electrode material of a lithium battery and a preparation method thereof. The product developed by the invention comprises a current collector, an active substance coating and an isolating layer, wherein the active substance coating comprises a sulfur carrier, conductive carbon black and sulfur, the isolating layer comprises polyethylene oxide and nano titanium dioxide, and the nano titanium dioxide is monodisperse nano titanium dioxide. During preparation, a sulfur carrier and sulfur are mixed, high-temperature sulfurizing is performed, the sulfurized sulfur carrier and the conductive carbon black are mixed, a dispersing agent is added for uniform dispersion, then the surface of the current collector is coated with the mixture, after drying, the surface of an active substance coating is coated with the mixed dispersion liquid of polyethylene oxide and nano titanium dioxide, and after coating is completed, drying is performed to obtain the lithium ion battery. The product provided by the invention has better cycle performance.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries. More specifically, it relates to an electrode material for a lithium battery and a preparation method thereof. Background technique [0002] Secondary batteries occupy an important position in the new energy structure, but the current commercialized secondary battery systems cannot meet the huge needs of important emerging fields such as electric vehicles and large-scale energy storage in terms of energy density and resource reserves. In principle, lithium-sulfur batteries can achieve low cost, high energy density and environmental friendliness, so they are considered to be a next-generation secondary battery system with great potential. However, the development of lithium-sulfur batteries still faces some urgent problems to be solved, such as the safety hazard caused by the growth of dendrites in the lithium negative electrode, the poor conductivity of the sulfur positive electrode, a...

Claims

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Application Information

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IPC IPC(8): H01M4/38H01M4/583H01M4/62H01M4/04H01M10/052
CPCH01M4/0404H01M4/38H01M4/583H01M4/625H01M10/052H01M2004/028Y02E60/10
Inventor 王军
Owner 深圳名仕堂贸易有限公司
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