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A kind of manufacturing method of all-solid-state electrolyte of lithium-sulfur battery

A technology of lithium-sulfur batteries and manufacturing methods, which is applied in the manufacture of electrolyte batteries, lithium batteries, non-aqueous electrolyte batteries, etc., can solve problems such as poor electrical conductivity and limited ability to adsorb active substance sulfur, and achieve the effect of improving purity

Active Publication Date: 2016-06-08
高能时代(珠海)新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to provide an all-solid-state electrolyte obtained by compounding porous carbon and sulfur in the prior art because of its limited ability to adsorb active substance sulfur and poor conductivity, which limits its application in batteries. All-solid-state electrolyte for lithium-sulfur batteries with high rate performance and high cycle performance of sulfur batteries

Method used

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  • A kind of manufacturing method of all-solid-state electrolyte of lithium-sulfur battery

Examples

Experimental program
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Effect test

Embodiment 1

[0041]1) In a 1L 316L stainless steel reactor, under the protection of continuously feeding 360ml / min nitrogen, add 3.3mol industrial grade NMP, 1.0mol industrial grade sodium sulfide and 0.003mol industrial grade sodium hydroxide, at 360rpm Under the condition of stirring, slowly raise the temperature of the reaction system to 108°C, then add 1.003mol industrial grade lithium chloride, continue to raise the temperature of the reaction system to 160°C, and keep the reaction system warm at this temperature 33min, until fine white crystals are precipitated in the reaction system, the water in the reaction system is evaporated and removed simultaneously, and heating is stopped; and filtered while hot, the white crystals in the reaction system are filtered out, and the filtrate is added to the reaction system The stirring intensity of the reaction kettle is 360rpm, add the sublimated sulfur and deionized oxygen-free water in the formula, wait until the temperature rises to 108°C, a...

Embodiment 2

[0044] 1) In a 1L 316L stainless steel reaction kettle, under the protection of continuously feeding 390ml / min nitrogen, add 4.8mol industrial grade NMP, 1.0mol industrial grade sodium sulfide and 0.003mol industrial grade sodium hydroxide, at 390rpm Under the condition of stirring, slowly raise the temperature of the reaction system to 118°C, then add 1.003mol industrial grade lithium chloride, continue to raise the temperature of the reaction system to 190°C, and keep the reaction system warm at this temperature 18min, until fine white crystals are separated out in the reaction system, the water content in the reaction system is evaporated and removed simultaneously, and heating is stopped; and filtered while hot, the white crystals in the reaction system are filtered out, and the filtrate is re-added to the reaction system, The stirring intensity of the reaction kettle is 390rpm, add the sublimated sulfur and deionized oxygen-free water in the formula, wait for the temperatu...

Embodiment 3

[0047] 1) In a 1L 316L stainless steel reaction kettle, under the protection of continuously feeding 370ml / min nitrogen, add 3.6mol industrial grade NMP, 1.0mol industrial grade sodium sulfide and 0.003mol industrial grade sodium hydroxide, at 370rpm Under the condition of stirring, slowly raise the temperature of the reaction system to 110°C, then add 1.003mol industrial grade lithium chloride, continue to raise the temperature of the reaction system to 188°C, and keep the reaction system warm at this temperature 21min, until fine white crystals are separated out in the reaction system, the water content in the reaction system is evaporated and removed at the same time, and heating is stopped; and filtered while hot, the white crystals in the reaction system are filtered out, and the filtrate is added to the reaction system again. The stirring intensity of the reaction kettle is 370rpm, add the sublimated sulfur and deionized oxygen-free water in the formula, wait for the temp...

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Abstract

The invention discloses a method for manufacturing an all-solid-state electrolyte for a lithium-sulfur battery. Polyacrylonitrile resin micropowder and diatomite are added to a high-speed mixing agitator at a mass ratio of 46-56:54-66, and NMP solvent is added to make the diatomite The quality of the soil is 18-24%wt, uniformly mixed into viscose clay and made into block materials of corresponding shapes as required, and the block viscose clay becomes a block containing only carbon in a high-temperature furnace replaced by nitrogen Diatomaceous earth, then put it in 18-33%wt NMP solution containing lithium polysulfide, lithium methaminobutyrate, lithium perchlorate, lithium phosphate for 13-18min, take it out and put it in a high-temperature furnace for several All-solid-state electrolytes for lithium-sulfur batteries were obtained after several times of impregnation and high-temperature evaporation. The preparation method of the invention is simple and the cost is low, and the prepared all-solid-state electrolyte for the lithium-sulfur battery has high sulfur-accommodating capacity, relatively high ion transmission capacity and electrical conductivity, and can improve the high-rate performance and high-cycle performance of the lithium-sulfur battery.

Description

[0001] Field [0002] The invention relates to a lithium-sulfur battery all-solid electrolyte and a preparation method thereof, belonging to the field of new energy materials. Background technique [0003] With the development of human society, problems such as energy shortage and environmental pollution have become increasingly prominent, and people's understanding and requirements for chemical power sources have become higher and higher, prompting people to continuously explore new energy storage systems based on chemical power sources. Lithium metal-based batteries have led the development of high-performance chemical power sources in recent decades. With the successful commercialization of lithium-ion batteries, countries around the world are stepping up research on lithium-ion power batteries for vehicles. However, due to factors such as energy density, safety, and price, conventional lithium-ion batteries such as lithium cobalt oxide, lithium manganese oxide, and lithiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058
CPCH01M10/052H01M10/0562Y02E60/10Y02P70/50
Inventor 宋大余李波徐晨
Owner 高能时代(珠海)新能源科技有限公司
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