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A preparation method of a lithium-sulfur battery negative electrode and a lithium-sulfur battery using the same

A technology of lithium-sulfur battery and lithium metal negative electrode, which is applied in electrode manufacturing, lithium storage battery, battery electrode and other directions, can solve the problems of reducing battery energy density and increasing battery cost, so as to improve specific capacity, reduce usage, and improve energy density Effect

Active Publication Date: 2022-06-17
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on the one hand, this will lead to a significant decrease in the energy density of the battery, and on the other hand, it will significantly increase the cost of the battery.

Method used

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  • A preparation method of a lithium-sulfur battery negative electrode and a lithium-sulfur battery using the same
  • A preparation method of a lithium-sulfur battery negative electrode and a lithium-sulfur battery using the same
  • A preparation method of a lithium-sulfur battery negative electrode and a lithium-sulfur battery using the same

Examples

Experimental program
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Effect test

Embodiment 1

[0039] like Figure 1-3 As shown, a preparation method of a lithium-sulfur battery negative electrode includes the following steps:

[0040] S1. Using the current collector as the base, align the lithium metal negative electrode assembly 1 with the area close to the tab end of the current collector, and form the composite body 1 by rolling. The size of the lithium metal negative electrode assembly 1 is 72*69 *0.08mm;

[0041] S2, using the assembly 1 as the base, align the lithium metal negative electrode assembly 2 and the collector away from the tab end area, and form the assembly 2 by rolling together; wherein, the size of the lithium metal negative electrode assembly 2 is 36* 69*0.05mm;

[0042] S3, then take the assembly 2 as the base, and use the surface of the assembly 2 that is not combined with the lithium metal negative electrode assembly 2 as the composite surface, align the lithium metal negative electrode assembly 3 with the area close to the collector tab end, ...

Embodiment 2

[0045] The difference between Example 2 and Example 1 is only that the dimensions of the lithium metal negative electrode assembly 1 to the lithium metal negative electrode assembly 4 in this embodiment are different from those in Example 1. Please refer to Table 1 for details.

Embodiment 3

[0047] The difference between Example 3 and Example 1 is only that the dimensions of the lithium metal negative electrode assembly 1 to the lithium metal negative electrode assembly 4 in this embodiment are different from those in Example 1, see Table 1 for details.

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Abstract

The invention discloses a preparation method of a negative pole of a lithium-sulfur battery and a lithium-sulfur battery using the negative pole, belonging to the technical field of lithium batteries. The preparation method of the negative electrode of the lithium-sulfur battery is as follows: taking the current collector as the base, combining it with the lithium metal negative electrode component 1 to form an assembly 1; using the assembly 1 as the base, combining it with the lithium metal negative electrode component 2 to form an assembly 2; The body 2 is the base, and the surface of the assembly 2 that is not combined with the lithium metal negative electrode assembly 2 is used as the composite surface, and the lithium metal negative electrode assembly 3 is combined to form the assembly 3; then the assembly 3 is used as the substrate, and the lithium metal negative electrode assembly 4 Composite into lithium-sulfur battery negative electrode. The lithium metal negative electrode assemblies 1 to 4 are different in size and the position where they are combined with the current collector. The lithium-sulfur battery negative unit, positive unit, and separator are laminated, injected with electrolyte, and packaged to form a lithium-sulfur battery. The lithium metal negative electrode of the present invention can improve the energy density of the lithium-sulfur battery and reduce the cost of the lithium-sulfur battery under the premise of improving the cycle life of the lithium-sulfur battery.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a preparation method of a negative electrode of a lithium-sulfur battery and a lithium-sulfur battery using the negative electrode. Background technique [0002] With the development of electric vehicles, new energy storage and the electronics industry, high-energy-density lithium batteries have become an urgent need in the market. Due to its extremely high theoretical energy density, lithium-sulfur batteries have attracted continuous research and attention in the scientific and industrial circles. At present, the negative electrode of lithium-sulfur battery is mainly lithium metal battery. Because of its extremely high theoretical specific capacity (3860mAh / g) and low potential (-3.04V), lithium metal negative electrode is considered to be the holy grail of lithium battery negative electrode. However, in lithium-sulfur batteries, the lithium metal negative electrode s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1395H01M4/04H01M4/134H01M4/38H01M10/052
CPCH01M4/1395H01M4/134H01M4/382H01M4/0435H01M10/052H01M2004/027Y02E60/10
Inventor 陈成猛王振兵苏方远孔庆强戴丽琴杨亚杰
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI