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Free-solvent-free lithium sulfonimide salt compositions that are liquid at room temperature, and uses thereof in lithium ion battery

一种水磺酰亚胺锂盐、磺酰亚胺锂的技术，应用在磺酰亚胺锂盐组合物领域，能够解决锂盐浓度不是很高等问题

Active Publication Date: 2020-09-08
SES HLDG PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported that ionic liquids can dissolve solid lithium salts to obtain liquid electrolytes, but the concentration of this lithium salt is not very high (typically less than 3 molar)

Method used

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  • Free-solvent-free lithium sulfonimide salt compositions that are liquid at room temperature, and uses thereof in lithium ion battery
  • Free-solvent-free lithium sulfonimide salt compositions that are liquid at room temperature, and uses thereof in lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Room temperature liquid lithium sulfonylimide salt composition using LiFSI and dimethoxyethane: Under an argon atmosphere, solid LiFSI (112 g) was placed in a 250 mL round bottom dry flask. The flask was fitted with a stir bar and cooled with an ice bath. Anhydrous dimethoxyethane (65 g) was added to the flask in portions to dissolve LiFSI. After complete addition of dimethoxyethane, the ice bath was removed and the solution was stirred at room temperature for 10 minutes using a stir bar. The resulting liquid solution was evacuated at <0.01 Torr for 24 hours at 35°C to obtain 152 g of a liquid LiFSI salt composition which appeared as a clear colorless liquid. The conductivity is 2.48m / S / cm.

Embodiment 2

[0038] Room temperature liquid lithium sulfonylimide salt composition using LiFSI and dimethoxyethane: Under an argon atmosphere, solid LiFSI (134.64 g) was placed in a 250 mL round bottom dry flask. The flask was fitted with a stir bar and cooled with an ice bath. Anhydrous dimethoxyethane (40 g) was added to the flask in portions to dissolve LiFSI. After complete addition of dimethoxyethane, the ice bath was removed and the solution was stirred at room temperature for 10 minutes using a stir bar. The resulting liquid solution was evacuated at <0.01 Torr for 24 hours at 35°C to obtain 174.6 g of a liquid LiFSI salt composition.

Embodiment 3

[0040] Room temperature liquid lithium sulfonylimide salt composition using LiFSI and dimethoxyethane: Solid LiFSI (33.1 g) was placed in a 250 mL round bottom dry flask under an argon atmosphere. The flask was fitted with a stir bar and cooled with an ice bath. Anhydrous dimethoxyethane (13.5 g) was added to the flask in portions to dissolve LiFSI. After complete addition of dimethoxyethane, the ice bath was removed and the solution was stirred at room temperature for 10 minutes using a stir bar. The resulting liquid solution was evacuated at <0.01 Torr for 24 hours at 35°C to obtain 45 g of a liquid LiFSI salt composition.

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Abstract

The invention provides free-solvent-free lithium sulfonimide salt compositions that are liquid at the room temperature, and methods of making the free-solvent-free liquid lithium sulfonimide salt compositions. In an embodiment, the methods include mixing one or more lithium sulfonimide salts with one or more ether-based solvents and then removing the free solvent(s) under suitable vacuum, temperature, and time conditions so as to obtain a free-solvent-free liquid lithium sulfonimide salt composition that is liquid at room temperature. In an embodiment, the only solvent molecules that remain inthe liquid lithium sulfonimide salt composition are adducted with lithium sulfonimide salt molecules. An example automated processing system for making free-solvent-free liquid lithium sulfonimide salts is also disclosed.

Description

[0001] Related application information [0002] This application claims U.S. Provisional Patent Application No. 62 / 812,446, filed March 1, 2019, entitled "LIQUID LITHIUM SALT: FREE-SOLVENT-FREE LITHIUM ELECTROLYTE WITH>12MOLAR CONCENTRATION IN ETHER-BASEDS SOLVENTS" and filed on April 2019 Benefit of Priority to U.S. Provisional Patent Application Serial No. 62 / 830,601, entitled "LIQUIDLITHIUM SALT: FREE-SOLVENT-FREE LIQUID LITHIUM BIS (FLUOROSULFONYL)IMIDE," filed on March 8, each of which is incorporated by reference in its entirety This article. technical field [0003] The present invention relates generally to the field of lithium sulfonylimide salts. In particular, the present invention relates to free-solvent-free lithium sulfonimide salt compositions that are liquid at room temperature and uses thereof. Background technique [0004] Today, no lithium salt is liquid at room temperature (ie, ~20°C to ~25°C). The only way one can get a room temperature liquid cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/086H01M10/0525H01M10/0568
CPCC01B21/086H01M10/0568H01M10/0525C07C303/42C01B21/093Y02E60/10H01G11/62H01G11/06H01G11/84C07C311/48H01M10/0569H01M2300/0025C07C311/10
Inventor R·P·辛格S·纳格斯瓦瑞胡启朝
Owner SES HLDG PTE LTD
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