Gel containing ester compound and sulfide as well as preparation and application of gel

A technology of ester compounds and salt compounds, which is applied in the field of gel electrolytes, can solve the problems of low ion conductivity and ion transfer number, and achieve the effects of simple preparation method, high ion conductivity and high ion transfer number

Active Publication Date: 2021-03-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low ionic conductivity and ion transfer number existing in gel electrolytes, the present invention provides a gel containing ester compounds and sulfides, its preparation and application, the gel has high ionic conductivity, high The ion transfer number and wide electrochemical window can be used as electrolytes in secondary ion batteries; the preparation method of the gel is simple, the preparation cycle is short, and it is easy for industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Under the protection of argon, 486mg sulfur, 100mg lithium sulfide and 135mg lithium hexafluorophosphate were successively added to the glass sample bottle, and then a mixture of 1.2g ethylene carbonate and dimethyl carbonate was added dropwise (the volume ratio of ethylene carbonate and dimethyl carbonate 1:1), stirred magnetically at room temperature (20°C±5°C) for 30h, mixed uniformly to obtain a suspension; left the suspension at room temperature for 30h to form a gel containing ester compounds and sulfides.

[0034] The color of the gel prepared in this example is light yellow, and the gel remains at the bottom of the sample bottle after the sample bottle is turned over, indicating that the gel has no fluidity.

[0035] Use the Vertex electrochemical workstation of IVIUM to test the impedance of the gel. The frequency range of the test is 100,000 Hz to 0.1 Hz. The working electrode and the counter electrode are all stainless steel, and the area of ​​the electrode is...

Embodiment 2

[0041] Under the protection of argon, add 139mg of sulfur, 100mg of lithium sulfide, 56mg of lithium hexafluorophosphate and 10mg of lithium bisfluorosulfonimide to the glass sample bottle in turn, and then dropwise add a mixture of 0.5g of ethylene carbonate and dimethyl carbonate (ethylene carbonate The volume ratio of ester to dimethyl carbonate is 1:1), magnetically stirred at room temperature (20°C±5°C) for 30h, and mixed uniformly to obtain a suspension; the suspension was left to stand at room temperature for 30h to form a Gels of compounds and sulfides.

[0042] The color of the gel prepared in this example is light yellow, and the gel remains at the bottom of the sample bottle after the sample bottle is turned over, indicating that the gel has no fluidity.

[0043] Use the Vertex electrochemical workstation of IVIUM to test the impedance of the gel. The frequency range of the test is 100,000 Hz to 0.1 Hz. The working electrode and the counter electrode are all stainle...

Embodiment 3

[0046] Under the protection of argon, 278mg sulfur, 100mg lithium sulfide and 90mg lithium hexafluorophosphate were successively added to the glass sample bottle, and then a mixture of 0.8g ethylene carbonate and dimethyl carbonate was added dropwise (the volume ratio of ethylene carbonate and dimethyl carbonate 1:1), stirred magnetically at room temperature (20°C±5°C) for 30h, mixed uniformly to obtain a suspension; left the suspension at room temperature for 30h to form a gel containing ester compounds and sulfides.

[0047] The color of the gel prepared in this example is light yellow, and the gel remains at the bottom of the sample bottle after the sample bottle is turned over, indicating that the gel has no fluidity.

[0048] Use the Vertex electrochemical workstation of IVIUM to test the impedance of the gel. The frequency range of the test is 100,000 Hz to 0.1 Hz. The working electrode and the counter electrode are all stainless steel, and the area of ​​the electrode is ...

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Abstract

The invention relates to gel containing ester compounds and sulfides as well as preparation and application of the gel, and belongs to the technical field of gel electrolytes. The gel is prepared from, by mass, 50%-80% of ester compounds, 2%-40% of salt compounds, 2%-45% of sulfur and 1%-20% of metal sulfide, the room-temperature ionic conductivity of the gel is 1.0*10<2> S/cm or above, the room-temperature ionic migration number of the gel is 0.6 or above, and the gel further has a wide electrochemical window. The electrolyte can be applied to a secondary ion battery; the preparation method of the gel is simple, short in preparation period and easy for industrial production.

Description

technical field [0001] The invention relates to a gel containing ester compounds and sulfides, its preparation and application, and belongs to the technical field of gel electrolytes. Background technique [0002] The structural skeleton of the gel is usually composed of cross-linked polymers, and the voids in the structural skeleton are filled with liquid media. Gelation can endow materials with some new features and can greatly improve some properties of materials, so it has been extensively studied. Due to its characteristics between solid and liquid, gels are widely used in production and life, such as electrolytes, jelly foods, biological matrices, human soft tissue replacement materials, contact lenses, cosmetics, building materials and drug carriers. [0003] Compared with traditional liquid electrolytes, gel electrolytes are semi-solid and have no fluidity, so they can prevent battery leakage, increase battery safety, replace diaphragms, and prevent the dissolution ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/058H01M10/052
CPCH01M10/052H01M10/056H01M10/058H01M2300/0085H01M2300/0091Y02E60/10Y02P70/50
Inventor 杨文杨乐陈人杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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