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A gelatable system containing straight-chain ether compounds and its preparation method and application

An ether compound, gelation technology, applied in electrochemical generators, electrical components, secondary batteries, etc., can solve the problems of time-consuming and laborious preparation, cumbersome and lengthy experimental methods, and different

Active Publication Date: 2020-11-06
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the gel system formed by the above two methods, whether it is used as the electrolyte of lithium-ion secondary batteries or used in the construction of artificial organs, it is inevitable to introduce polymers from raw materials or the synthesis steps are relatively complicated. The organic gel factor of the small molecule, and usually use more cumbersome and lengthy experimental methods, the preparation of time-consuming and labor-intensive raw materials, and it is easy to appear that the gel system obtained is not the same due to the difference in the molecular weight of the polymer. There will also be differences in the products prepared by gel
Moreover, the gel systems reported so far are irreversible, that is, after the gel is destroyed, it is difficult to restore the original shape and advantages, which also limits the use and promotion of the gel.

Method used

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  • A gelatable system containing straight-chain ether compounds and its preparation method and application
  • A gelatable system containing straight-chain ether compounds and its preparation method and application
  • A gelatable system containing straight-chain ether compounds and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] (1) Preparation of gelable system and gel (gel electrolyte that can be used as battery)

[0114] Weigh 0.7g of lithium perfluorobutane sulfonate solid in a reagent bottle, add 3.0mL of ethylene glycol methyl ethyl ether and 2.0 mL of ethylene glycol diethyl ether (water has been removed through molecular sieves before use), under magnetic stirring , to be prepared into lithium perfluorobutanesulfonate / ethylene glycol methyl ethyl ether+ethylene glycol diethyl ether solution with a lithium salt content of 12wt%, and continue to stir for a period of time to obtain a gelatable system; glue.

[0115] In the gel system, the mass percentage of the lithium salt is 12 wt %; the mass percentage of the linear ether compound is 88 wt %.

[0116] After testing, the formation time of the gel is 24 hours; the formation temperature of the gel is room temperature, the transition temperature of the gel is 67°C, and the conductivity of the gel is 4.97×10 -4 S / cm.

[0117] When the pre...

Embodiment 2

[0119] (1) Preparation of gelable system and solid electrolyte

[0120] Weigh 0.45g of lithium hexafluorophosphate (LiPF 6 ) and 0.45g of lithium perchlorate (LiClO 4 ) solid in a reagent bottle, add 3.6mL of ethylene glycol dimethyl ether (water has been removed through molecular sieves before use), and under magnetic stirring, it is prepared into LiPF with a lithium salt content of 20wt%. 6 +LiClO 4 / ethylene glycol methyl ethyl ether, and continue to stir to obtain a gelatinable system; stand for a period of time to obtain a solid electrolyte.

[0121] In the solid electrolyte system, the mass percentage of lithium salt is 20 wt%; the mass percentage of linear ether compounds is 80 wt%.

[0122] After testing, the formation time of the solid electrolyte is 12 hours; the formation temperature of the solid electrolyte is room temperature, the transition temperature of the solid electrolyte is 84°C, and the conductivity of the solid electrolyte is 3.31×10 -6 S / cm.

[0123...

Embodiment 3

[0125] (1) Preparation of gelable system and gel (gel electrolyte that can be used as battery)

[0126] Weigh 0.4g of lithium perchlorate and 0.2g of lithium hexafluoroarsenate solid in the reagent bottle, add 1.0mL of lithium-ion battery conventional electrolyte (containing 1mol / L LiPF 6 A mixed solution of dimethyl carbonate (DMC) and ethylene carbonate (EC) with a volume ratio of 1:1), the lithium salt was completely dissolved under magnetic stirring, and then 1.5 mL of 1,4-butanediol dimethyl ether was added In the above mixed solution, after being fully mixed, a gelatable system is obtained; after standing for a period of time, a gel is formed.

[0127] In the gel system, the mass percentage of lithium salt is 19 wt%, the mass percentage of linear ether compounds is 48 wt%, and the mass percentage of other solvents and / or electrolytes is 33 wt%.

[0128] After testing, the performance parameters of the gel are listed in Table 1.

[0129] When the prepared gel is heated ...

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Abstract

The invention discloses a gellable system and a gel and / or solid electrolyte prepared therefrom, and a preparation method and application thereof. The system comprises a lithium salt and an ether compound, wherein the ether compound is selected from linear ether compounds. The system may comprise other solvent and / or electrolyte, and inorganic nanometer particles. By adjusting the constituent contents and varieties of the lithium salt and the linear ether compound in the system, the gel and / or solid electrolyte with adjustable strength, adjustable formation time, adjustable transition temperature and reversibility can be prepared. The preparation method is simple in process, mild in reaction conditions, short in reaction period, high in product yield, low in preparation cost and easy to realize industrial production. The prepared gel and / or solid electrolyte can be applied to fields like lithium-based batteries.

Description

technical field [0001] The invention belongs to the technical field of gel electrolyte and its preparation, and in particular relates to a gelatable system containing straight-chain ether compounds and its preparation method and application. Background technique [0002] In recent years, due to human activities, fossil energy has declined sharply, and some energy sources are about to be exhausted. The resulting environmental degradation and irrational use of resources have brought a significant impact on human life and production. In order to meet people's growing material and cultural needs, but also to ensure people's safe and green production and life, it is urgent to develop a new type of safe and environmentally friendly energy system. [0003] Gel is a semi-solid system between liquid and solid. It has the advantages and characteristics of both liquid and solid. Therefore, it has become a hot spot in the field of research and production and life. There are also many re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565
CPCH01M10/0565Y02E60/10
Inventor 李林刘凤泉周建军方芳
Owner BEIJING NORMAL UNIVERSITY
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