Method for efficiently preparing and collecting chalcogenide solid electrolyte

A solid-state electrolyte and sulfur-based technology, which is applied in the direction of non-aqueous electrolyte batteries, electrolyte battery manufacturing, electrolyte immobilization/gelation, etc., can solve the problem of low efficiency of chemical synthesis and collection, and achieve efficient synthesis and collection, high-efficiency reaction, The effect of reducing losses

Inactive Publication Date: 2017-01-11
SHANGHAI INST OF SPACE POWER SOURCES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to provide a new method to efficiently prepare and collect chalcogenide solid electroly

Method used

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  • Method for efficiently preparing and collecting chalcogenide solid electrolyte
  • Method for efficiently preparing and collecting chalcogenide solid electrolyte
  • Method for efficiently preparing and collecting chalcogenide solid electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Weigh 0.4738g of lithium sulfide (99.9%) powder and 1.5262g of phosphorus pentasulfide (99%) in a glove box with an inert protective atmosphere, first grind them evenly in an agate mortar, and then add ZrO with a volume of 50ml 2 In a ball mill jar, 120 grains of ZrO with a diameter of 5 mm and 3 mL of a diameter of 2 mm 2 The grinding balls are placed in a ball mill jar, first set at a speed of 200rpm for 0.5h of ball milling, and then switch to a speed of 1000rpm for 10h of ball milling. After the ball milling is completed, put the ball milling jar in the glove box, drop 20 mL of aprotic organic solvent (eg, NMF) into the ball milling jar, seal it and ball mill it at a speed of 100 rpm for 30 min. The solution in the grinding tank was collected in a specific glass container in the glove box again, and the glass container was heated and stirred at 80° C. for 1 hour. After the solvent volatilized, the powder of the solid electrolyte was precipitated. The powder is amor...

Embodiment 2

[0027] Weigh 0.2369g of lithium sulfide powder and 0.7631g of phosphorus pentasulfide in a glove box with an inert protective atmosphere, first grind them evenly in an agate mortar, then add 50ml of ZrO 2 In a grinding jar, 30 mL of ZrO with a diameter of 1 mm 2 The grinding balls were placed in a ball mill jar, and ball milled for 10 h at a speed of 1000 rpm. After the ball milling is completed, put the ball mill jar in a glove box, drop 20 mL of absolute ethanol into the ball mill jar, seal it, and ball mill it at a speed of 100 rpm for 30 min. In the glove box again, the solution in the grinding jar (and the solution after rinsing the ball milling jar with absolute ethanol) was collected in a specific glass container, and a certain amount of LiCoO 2 (as an active material) placed in a diluted solid electrolyte solution (according to the mass ratio of active material to solid electrolyte 95:5), the mixture was heated and stirred at 80°C for 3 hours, and the solid electrolyt...

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Abstract

The invention discloses a method for efficiently preparing and collecting chalcogenide solid electrolyte. The method comprises the following steps of 1, performing dry milling: putting lithium sulfide and phosphorus pentasulfide into a ball mill container to be subjected to ball milling mixing for preparing Li3PS4; 2, performing wet milling: adding a proton inert organic solvent into the ball mill container; performing ball milling stirring to realize the dissolution of the Li3PS4 for obtaining an Li3PS4 solution; 3, transferring the Li3PS4 solution in the ball mill container into a collecting container; performing drying to remove organic solvents. The efficient preparation and collection of the chalcogenide solid electrolyte is realized. Through the continuous ball milling, solution and deposition paths, the adhesion and residue of powdery products on the inner wall of a ball mill tank and the surface of a grinding ball in the collecting process are greatly reduced; the purity and the collection efficiency of the solid electrolyte are improved; meanwhile, the method is also suitable for being used for realizing continuous in-situ coverage on the solid electrolyte layer on the surface of active materials.

Description

technical field [0001] The invention belongs to the field of solid-state lithium ion batteries, and relates to a sulfur-based solid electrolyte, in particular to a process method for efficiently preparing and collecting the sulfur-based solid electrolyte. Background technique [0002] All-solid-state lithium-ion battery is one of the new lithium-ion battery systems proposed to solve the problem of poor safety performance of liquid electrolyte lithium-ion batteries. By replacing the separator and organic electrolyte with a solid electrolyte material with higher thermal stability, the safety of lithium-ion batteries can be fundamentally improved. As a solid lithium-conducting layer, the solid electrolyte can give full play to the advantages of the flexibility and changeable shape of the solid structure, which is expected to change the traditional preparation process of lithium-ion batteries and obtain lithium-ion batteries with diverse shapes. At the same time, the solid elec...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0562
CPCH01M10/0562H01M10/058H01M2300/0085Y02E60/10Y02P70/50
Inventor 吴晓萌刘洋汤卫平吴勇民
Owner SHANGHAI INST OF SPACE POWER SOURCES
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