All-solid-state lithium metal-sulfur battery and preparation method thereof

A lithium metal, all-solid-state technology, applied in the field of all-solid-state lithium metal-sulfur batteries and their preparation, achieves the effects of good wetting effect, low contact resistance, and high ionic conductivity

Active Publication Date: 2019-05-17
湖州天丰电源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems existing in the existing all-solid-state lithium metal-sulfur battery, and to provide an all-solid-state lithium-metal-sulfur battery using a novel thin-film composite solid electrolyte

Method used

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  • All-solid-state lithium metal-sulfur battery and preparation method thereof
  • All-solid-state lithium metal-sulfur battery and preparation method thereof
  • All-solid-state lithium metal-sulfur battery and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] Use lithium bistrifluoromethylsulfonyl imide, polyethylene oxide, and tetraethylene glycol dimethyl ether as raw materials, and use acetonitrile as an organic solvent to form a dilute solution in an inert atmosphere, in which bistrifluoromethylsulfonyl The monomer molar ratio of lithium amine to polyethylene oxide is 1:5, and the mass ratio of lithium bistrifluoromethanesulfonimide-polyoxyethylene to tetraethylene glycol dimethyl ether is 1:1. Coated on both sides of the membrane surface, vacuumed and dried at 60°C for 1 hour.

[0027]Sublimed sulfur powder, nano-magnesia powder, carbon nanotubes, Ketjen black, and polyethylene oxide were used as raw materials, and N-methylpyrrolidone was used as a solvent to prepare a slurry, followed by mechanical stirring for 24 hours to obtain a uniform slurry, and then coated On the surface of aluminum foil, vacuum dry at 60°C for 24 hours to remove N-methylpyrrolidone. Then use lithium bistrifluoromethanesulfonimide, polyethylene...

Embodiment 2

[0031] Use lithium bistrifluoromethylsulfonyl imide, polyethylene oxide, and tetraethylene glycol dimethyl ether as raw materials, and use acetonitrile as an organic solvent to form a dilute solution in an inert atmosphere, in which bistrifluoromethylsulfonyl The monomer molar ratio of lithium amine to polyethylene oxide is 1:5, and the mass ratio of lithium bistrifluoromethanesulfonimide-polyoxyethylene to tetraethylene glycol dimethyl ether is 1:1. Coated on both sides of the membrane surface, vacuumed and dried at 60°C for 1 hour.

[0032] Sublimed sulfur powder, nano-magnesia powder, carbon nanotubes, Ketjen black, and polyethylene oxide were used as raw materials, and N-methylpyrrolidone was used as a solvent to prepare a slurry, followed by mechanical stirring for 24 hours to obtain a uniform slurry, and then coated On the surface of aluminum foil, vacuum dry at 60°C for 24 hours to remove N-methylpyrrolidone. Then use lithium bistrifluoromethanesulfonimide, polyethylen...

Embodiment 3

[0035] Use lithium bistrifluoromethylsulfonyl imide, polyethylene oxide, and tetraethylene glycol dimethyl ether as raw materials, and use acetonitrile as an organic solvent to form a dilute solution in an inert atmosphere, in which bistrifluoromethylsulfonyl The monomer molar ratio of lithium amine to polyethylene oxide is 1:5, and the mass ratio of lithium bistrifluoromethanesulfonimide-polyoxyethylene to tetraethylene glycol dimethyl ether is 1:1. Coated on both sides of the membrane surface, vacuumed and dried at 60°C for 1 hour.

[0036] Sublimed sulfur powder, nano-magnesia powder, carbon nanotubes, Ketjen black, and polyethylene oxide were used as raw materials, and N-methylpyrrolidone was used as a solvent to prepare a slurry, followed by mechanical stirring for 24 hours to obtain a uniform slurry, and then coated On the surface of aluminum foil, vacuum dry at 60°C for 24 hours to remove N-methylpyrrolidone. Then use lithium bistrifluoromethanesulfonimide, polyethylen...

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Abstract

The invention discloses an all-solid-state lithium metal-sulfur battery and a preparation method thereof. At present, the all-solid-state lithium metal-sulfur batteries have the disadvantages of largecontact resistance between solid electrolyte and anode/cathode, too thickness solid electrolyte and difficult batch production of the solid electrolyte. Electrolyte used by the all-solid-state lithium metal-sulfur battery provided by the invention is thin film type composite solid electrolyte of lithium bis(trifluoromethanesulphonyl)imide/polyoxyethylene/tetraethylene glycol dimethyl ether@lithium-ion battery separator; materials of a sulfur anode comprise sulfur powder, nanometer magnesia, a carbon nanotube, keqin black and polyoxyethylene; the surface of a sulfur anode piece is coated withlithium bis(trifluoromethanesulphonyl)imide/polyoxyethylene/tetraethylene glycol dimethyl ether; and the surface of a cathode of lithium metal is coated with lithium bis(trifluoromethanesulphonyl)imide/polyoxyethylene/tetraethylene glycol dimethyl ether. The thin film type composite solid electrolyte is capable of avoiding the aero effect of the sulfur anode; and the prepared all-solid-state lithium metal-sulfur battery has relatively high cycle stability.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, in particular to an all-solid lithium metal-sulfur battery and a preparation method thereof. Background technique [0002] According to my country's "Technology Roadmap for Energy Saving and New Energy Vehicles", the specific energy of power lithium-ion batteries will reach 300Wh / Kg in 2020; by 2030, the specific energy will reach 500Wh / Kg, while conventional commercial lithium-ion batteries will reach 300Wh After that, it has basically reached the theoretical ceiling limited by current materials, and it is not only difficult but also extremely unsafe to further increase the specific energy of lithium-ion batteries. Only by setting up a separate stove and completely reforming the old framework of lithium-ion batteries and the corresponding battery materials can it be possible to greatly improve the specific energy of lithium-ion batteries under the premise of ensuring safety. At present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/052H01M10/058
CPCY02E60/10Y02P70/50
Inventor 张鹏谢健楠杨光金明钢陈丽霞韩改格
Owner 湖州天丰电源有限公司
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