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A kind of preparation method of sulfur-containing electrode material

An electrode material, sulfur-based technology, applied in electrode manufacturing, battery electrodes, circuits, etc., can solve the problems of poor battery safety, loss of active material, puncture of the separator, etc., to achieve high capacity, good cycle performance, low self The effect of discharge speed

Active Publication Date: 2018-01-19
GUANGDONG ZHUGUANG NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, elemental sulfur itself is not conductive, and must be combined with a conductive substance to make an electrode, and the introduction of a conductive agent as a conductive component will lead to a significant reduction in the content of sulfur in the positive electrode coating, thereby reducing lithium. The energy density of sulfur batteries; at the same time, during the charging and discharging process of lithium-sulfur batteries, elemental sulfur will be converted into polysulfides, and polysulfides will dissolve in the liquid organic electrolyte, resulting in the loss of active materials during the cycle, which is more Seriously, the dissolved sulfide will precipitate on the negative electrode to form dendrites, which has a great risk of piercing the separator, resulting in extremely poor safety of the battery

Method used

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  • A kind of preparation method of sulfur-containing electrode material

Examples

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Embodiment 1

[0025] Embodiment 1, differs from comparative example in that this embodiment comprises the following steps:

[0026] Preparation of sulfur-containing liquid components: In a helium environment, place elemental sulfur in an atomization reactor at 150°C, and dissolve elemental sulfur into a liquid state for use;

[0027] Filling of sulfur-containing components: select a porous carbon material with a particle size of 10 μm to 20 μm, a pore size of 10 nm to 50 nm, and a porosity of 80% as the substrate (substrate: sulfur-containing component=3:7), and heat up to 150°C; Atomize the above liquid sulfur to obtain mist-like sulfur-containing component particles with a particle size of 200nm, and then the mist-like sulfur-containing component contacts and mixes with the substrate, and the mist-like sulfur-containing component penetrates into the porous substrate In the pore structure of the material, a porous composite filled with sulfur-containing components is obtained;

[0028] Pr...

Embodiment 2

[0030]Embodiment 2, different from Embodiment 1, this embodiment includes the following steps:

[0031] Filling of sulfur-containing components: select a porous carbon material with a particle size of 10 μm to 20 μm, a pore size of 10 nm to 50 nm, and a porosity of 80% as the substrate (substrate: sulfur-containing component=3:7), and heat up to 150°C; the above-mentioned liquid sulfur is atomized to obtain mist-like sulfur-containing component particles with a particle size of 5 μm, and then the mist-like sulfur-containing component contacts and mixes with the substrate, and the mist-like sulfur-containing component penetrates into the porous substrate In the pore structure of the material, a porous composite filled with sulfur-containing components is obtained;

[0032] Others are the same as in Example 1, and will not be repeated here.

Embodiment 3

[0033] Embodiment 3, different from Embodiment 1, this embodiment includes the following steps:

[0034] Filling of sulfur-containing components: select a porous carbon material with a particle size of 10 μm to 20 μm, a pore size of 10 nm to 50 nm, and a porosity of 80% as the substrate (substrate: sulfur-containing component=3:7), and heat up to 150°C; Atomize the above liquid sulfur to obtain mist-like sulfur-containing component particles with a particle size of 2 μm, and then the mist-like sulfur-containing component contacts and mixes with the substrate, and the mist-like sulfur-containing component penetrates into the porous substrate In the pore structure of the material, a porous composite filled with sulfur-containing components is obtained;

[0035] Others are the same as in Example 1, and will not be repeated here.

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Abstract

The invention belongs to the field of lithium sulfur batteries, and particularly relates to a preparation method of a sulfur-containing electrode material. The preparation method comprises the following three steps: preparation of a sulfur-containing liquid component, filling of the sulfur-containing component and preparation of a sulfur-containing electrode component. The preparation method comprises the following steps: firstly melting the sulfur-containing component at a high temperature to obtain a liquid component capable of flowing; atomizing the liquid sulfur-containing component into tiny foggy liquid particles through an atomizer, then enabling the tiny foggy liquid particles to be in contact with a porous base material so that the foggy particles are uniformly dispersed on the surface of each porous base material and then are permeated and infiltrated in the pore structure; realizing uniform and sufficient filling of each porous base material particle through the sulfur-containing component, and then cooling and solidifying to obtain the sulfur-containing electrode component.

Description

technical field [0001] The invention belongs to the field of lithium-sulfur batteries, and in particular relates to a preparation method of a sulfur-containing electrode material. Background technique [0002] Since 1991, carbon materials were creatively used in the field of lithium-ion batteries and brought about revolutionary changes in this field, that is, after multiple charging and discharging efficiently and safely, they have been widely used in mobile phones, cameras, and notebooks. computers and other portable appliances. Compared with traditional lead-acid, Ni-Cd, MH-Ni batteries, lithium-ion batteries have higher specific volume energy density, specific gravimetric energy density, better environmental friendliness, smaller self-discharge and longer battery life. It is an ideal power supply for mobile appliances, power supplies for electric vehicles, and storage appliances for power stations in the 21st century. [0003] However, with the improvement of life taste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/36H01M4/38H01M10/052
CPCH01M4/04H01M4/0402H01M4/362H01M4/38H01M10/052Y02E60/10
Inventor 杨玉洁
Owner GUANGDONG ZHUGUANG NEW ENERGY TECH