Process for manufacturing lithium sulfur battery

A lithium-sulfur battery and manufacturing process technology, which is applied in electrode manufacturing, sustainable manufacturing/processing, secondary batteries, etc., can solve problems such as poor electrical conductivity and limited ability to adsorb active material sulfur

Active Publication Date: 2014-08-13
威海区域创新中心有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] 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 subst

Method used

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  • Process for manufacturing lithium sulfur battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In a 1L 316L stainless steel reaction kettle, under the protection of continuously feeding 160ml / min nitrogen, add 5.6mol industrial superior grade NMP, 1.0mol industrial superior grade sodium sulfide and 0.001mol industrial superior grade sodium hydroxide, and stir at 690rpm Slowly raise the temperature of the reaction system to 138°C, then add 1.003mol of industrial grade lithium chloride, continue to raise the temperature of the reaction system to 160°C, and keep the reaction system at this temperature for 9 minutes, When fine white crystals are precipitated in the reaction system, evaporate and remove the water in the reaction system at the same time, and stop heating; filter while hot, filter out the white crystals in the reaction system, add the filtrate to the reaction system again, Stirring intensity is 160rpm, add sublimated sulfur of 4mol / mol lithium sulfide and deionized oxygen-free water, wait until the temperature rises to 138°C, and keep it under reflux for...

Embodiment 2

[0059] In a 1L 316L stainless steel reaction kettle, under the protection of continuously feeding 690ml / min nitrogen, add 6.6mol industrial superior grade NMP, 1.0mol industrial superior grade sodium sulfide and 0.001mol industrial superior grade sodium hydroxide, and stir at 690rpm Slowly raise the temperature of the reaction system to 148°C, then add 1.003mol of industrial grade lithium chloride, continue to raise the temperature of the reaction system to 190°C, and keep the reaction system warm for 6min under this temperature condition, When fine white crystals are precipitated in the reaction system, evaporate and remove the water in the reaction system at the same time, and stop heating; filter while hot, filter out the white crystals in the reaction system, add the filtrate to the reaction system again, The stirring intensity is 690rpm, add 8mol / mol lithium sulfide sublimated sulfur and deionized anaerobic water, wait for the temperature to rise to 148°C, and keep it unde...

Embodiment 3

[0064] In a 1L 316L stainless steel reaction kettle, under the protection of continuously feeding 261ml / min nitrogen, add 5.8mol industrial superior grade NMP, 1.0mol industrial superior grade sodium sulfide and 0.001mol industrial superior grade sodium hydroxide, and stir at 234rpm Slowly raise the temperature of the reaction system to 139°C, then add 1.003mol of industrial superior lithium chloride, continue to raise the temperature of the reaction system to 163°C, and keep the reaction system warm for 7min under this temperature condition, When fine white crystals are precipitated in the reaction system, evaporate and remove the water in the reaction system at the same time, and stop heating; filter while hot, filter out the white crystals in the reaction system, add the filtrate to the reaction system again, The stirring intensity is 234rpm, add 5mol / mol lithium sulfide sublimated sulfur and deionized anaerobic water, wait until the temperature rises to 139°C, and keep it u...

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Abstract

The invention discloses a process for manufacturing a lithium sulfur battery. The process comprises the following steps: adding polyacrylonitrile resin micro powder and diatomite into a high-speed mixing stirrer according to a mass ratio of 36-39 to 64-61, adding an NMP solvent which accounts for 6-24 weight percent of the diatomite to serve as a raw material, performing pretreatment, and performing repeated dipping and high-temperature evaporation in an NMP solution of lithium salt (namely a 6-9 weight percent of NMP solution containing lithium polysulfide, lithium methylaminobutyrate, lithium perchlorate and lithium phosphate), thereby preparing a positive material; preparing all-solid-state electrolyte of the lithium sulfur battery from lithium methylaminobutyrate, lithium perchlorate and lithium phosphate; and adsorbing molten metal lithium through pores of carbon-containing diatomite at 630-660 DEG C when metal lithium and the formed carbon-containing diatomite electrode are in a vacuum electric heating furnace, thereby finishing preparation of a negative material. The all-solid-state electrolyte of the lithium sulfur battery prepared by the process has high sulfur containing capacity, high ion transport capacity and high conductive performance, and the high rate performance and high cycle performance of the lithium sulfur battery can be improved.

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. 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 lithium iron pho...

Claims

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Application Information

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IPC IPC(8): H01M10/38H01M4/04
CPCH01M4/0471H01M10/38Y02E60/10Y02P70/50
Inventor 宋大余李波徐晨
Owner 威海区域创新中心有限责任公司
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