Lithium-sulfur battery and preparation method thereof

A lithium-sulfur battery and cell technology, which is applied in the manufacture of electrolyte batteries, battery electrodes, secondary batteries, etc., can solve the problems of active material loss, poor battery safety, and piercing the separator, so as to reduce process manufacturing costs and raw materials The effect of cost of use

Active Publication Date: 2015-05-27
GUANGDONG ZHUGUANG NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the charging and discharging process, the elemental sulfur will be converted into polysulfides, and the polysulfides will be dissolved in the liquid organic electrolyte, resulting in the loss of active materia

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 , different from Comparative Example 2, this embodiment includes the following steps:

[0034]Polymer solution configuration: according to the ratio of methyl methacrylate: diisopropyl peroxydicarbonate: ethylene glycol dimethyl ether = 20: 0.5: 79.5, first weigh methyl methacrylate, ethylene glycol di Stir the methyl ether evenly for later use, and then add the corresponding proportion of diisopropyl peroxydicarbonate within 1 month before use.

[0035] Preparation of cathode sheet: same as Comparative Example 2.

[0036] Cathode film spraying: According to the relationship that the quality of methyl methacrylate is 5% of the mass of the cathode coating (that is, 0.5g of polymer solution), the polymer solution is evenly sprayed on the surface of the cathode film, and after it is fully infiltrated, the obtained The cathode sheet after spraying.

[0037] Electrolyte configuration: according to the mass ratio relationship of 1,3-dioxolane: ethylene glycol di...

Embodiment 2

[0040] Example 2 , different from Embodiment 1, this embodiment includes the following steps:

[0041] Polymer solution configuration: according to the ratio of methyl methacrylate: diisopropyl peroxydicarbonate: ethylene glycol dimethyl ether = 1: 0.05: 200, first weigh methyl methacrylate, ethylene glycol di Stir the methyl ether evenly for later use, and then add the corresponding proportion of diisopropyl peroxydicarbonate within 1 month before use.

[0042] Preparation of cathode sheet: same as Comparative Example 2.

[0043] Cathode film spraying: According to the relationship that the quality of methyl methacrylate is 0.1% of the mass of the cathode coating (that is, 0.4g of polymer solution), the polymer solution is evenly sprayed on the surface of the cathode film, and after it is fully infiltrated, the obtained The cathode sheet after spraying.

[0044] Others are the same as in Example 1, and will not be repeated here.

Embodiment 3

[0045] Example 3 , different from Embodiment 1, this embodiment includes the following steps:

[0046] Polymer solution configuration: according to the ratio of methyl methacrylate: diisopropyl peroxydicarbonate: ethylene glycol dimethyl ether = 1:0.05:1, first weigh methyl methacrylate, ethylene glycol di Stir the methyl ether evenly for later use, and then add the corresponding proportion of diisopropyl peroxydicarbonate within 1 month before use.

[0047] Preparation of cathode sheet: same as Comparative Example 2.

[0048] Cathode film spraying: According to the relationship that the quality of methyl methacrylate is 20% of the mass of the cathode coating (that is, 0.4g of polymer solution), the polymer solution is evenly sprayed on the surface of the cathode film, and after it is fully infiltrated, the obtained The cathode sheet after spraying.

[0049] Others are the same as in Example 1, and will not be repeated here.

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PUM

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Abstract

The invention belongs to the field of lithium-sulfur batteries and particularly relates to a preparation method of a lithium-sulfur battery and the lithium-sulfur battery prepared by adopting the method. When the method provided by the invention is used for preparing the lithium-sulfur battery, a polymer component is only introduced in a cathode of the lithium-sulfur battery, a polymer is not introduced in an anode electrode, and a solvent for configuring polymer slurry is selected from components in an electrolyte of the lithium-sulfur battery. Thus, the content of the polymer component can be introduced as small as possible, the solvent residues caused by using other solvents are avoided, and thus the lithium-sulfur battery has better performance.

Description

technical field [0001] The invention belongs to the field of lithium-sulfur batteries, in particular to a lithium-sulfur battery and a preparation method thereof. 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, people put forw...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0525H01M4/62H01M10/0569
CPCH01M4/602H01M4/62H01M10/0525H01M10/0564H01M10/058Y02E60/10Y02P70/50
Inventor 杨玉洁
Owner GUANGDONG ZHUGUANG NEW ENERGY TECH
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