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A kind of gelatinable system containing cyclic ether compound and its preparation method and application

An ether compound and gelation technology, which is applied in the direction of electrolyte immobilization/gelation, fuel cell half-cells and secondary battery-type half-cells, electrochemical generators, etc., can solve the problem of limiting the use of gels and popularization, cumbersome and lengthy experimental methods, time-consuming and labor-intensive preparation, etc., to achieve the effect of solving solution leakage, high charge and discharge efficiency, and preventing battery short circuit

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 applied to the construction of artificial organs and other fields, it is inevitable to introduce polymers from raw materials or complex synthesis steps. Small molecule organic gelling factors, and usually use cumbersome and lengthy experimental methods to prepare time-consuming and labor-intensive raw materials, and it is easy to cause different gel systems due to the difference in molecular weight of high molecules, resulting in the above-mentioned There are problems such as 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 kind of gelatinable system containing cyclic ether compound and its preparation method and application
  • A kind of gelatinable system containing cyclic ether compound and its preparation method and application
  • A kind of gelatinable system containing cyclic ether compound and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] (1) Preparation of gelatable system and solid electrolyte

[0100] Weigh 0.5g of solid lithium tetrafluoroborate in a reagent bottle, add 1.6mL of tetrahydropyran, and make all the lithium salts dissolve under magnetic stirring to prepare lithium tetrafluoroborate / tetrahydrogen with a lithium salt content of 23wt% A pyran solution is obtained to obtain a gelatable system; after standing for a period of time, a solid electrolyte is obtained.

[0101] After testing, the formation time of the solid electrolyte is 6h, the formation temperature of the solid electrolyte is room temperature, and the transition temperature of the solid electrolyte is 90°C; the conductivity of the solid electrolyte is 1.06×10 -6 S / cm.

[0102] When the prepared solid electrolyte is heated above 90°C, the solid electrolyte begins to become viscous, and the solid electrolyte is observed to flow downward when the reagent bottle is inverted, indicating that the transition temperature of the solid e...

Embodiment 2

[0106] (1) Preparation of gelatable system and gel (which can be used as a gel electrolyte for batteries)

[0107] Weigh 0.7g of solid lithium hexafluoroarsenate into a reagent bottle, add 5.0mL of 1,4-dioxane, and under magnetic stirring, prepare lithium hexafluoroarsenate with a lithium salt content of 12wt% / 1 , 4-dioxane solution to obtain a gelatable system; continue to stir and stand for a period of time to obtain a gel.

[0108] After testing, the formation time of the gel is 24h; the formation temperature of the gel is room temperature, the transition temperature of the gel is 65°C, and the conductivity of the gel is 5.27×10 -4 S / cm.

[0109] figure 1 It is an optical photograph of the gel of Example 2. It can be seen from the figure that a colorless and transparent gel can be prepared by using the ratio of the above-mentioned lithium salt and cyclic ether cyclic compound; in addition, below the transition temperature, The gel did not flow when the vial was inverted....

Embodiment 3

[0114] (1) Preparation of gelatable system and solid electrolyte

[0115] Weigh 0.45 g of lithium fluorosulfonimide and 0.45 g of lithium perchlorate (LiClO 4) solid in a reagent bottle, add 3.6 mL of 2-methyltetrahydropyran, and prepare under magnetic stirring to prepare lithium fluorosulfonimide+LiClO with a lithium salt content of 20 wt% 4 / 2-methyltetrahydropyran solution to obtain a gelatinable system; continue stirring and stand for a period of time to obtain a solid electrolyte.

[0116] After testing, the formation time of the solid electrolyte is 12h; the formation temperature of the solid electrolyte is room temperature, the transition temperature of the solid electrolyte is 80°C, and the conductivity of the solid electrolyte is 3.26×10 -6 S / cm.

[0117] figure 2 It is an optical photo of the solid electrolyte of Example 3. It can be seen from the figure that the solid electrolyte can be prepared by using the ratio of the above-mentioned lithium salt and cyclic e...

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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 cyclic ether compounds. By adjusting the constituent contents and varieties of the lithium salt and the cyclic 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 can be applied to fields such as lithium-basedbatteries; and the prepared solid electrolyte can be applied to fields such as lithium-based batteries, including lithium ion batteries, lithium sulfur batteries, lithium air batteries, etc.

Description

technical field [0001] The invention belongs to the technical field of gel and its preparation, in particular to a gelatable system containing a cyclic ether compound, a preparation method and application thereof. Background technique [0002] In recent years, due to the sharp decline of fossil energy caused by human activities, some energy sources are about to be exhausted, and the resulting environmental deterioration and unreasonable use of resources have brought a considerable impact on human life and production. In order to meet people's growing material and cultural needs, and at the same time to ensure people's safe and green production and life, it is imperative to develop a new 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, which also makes it one of the hot spots in the research field and production and life, and there are also many st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/052H01M10/0525H01M12/08
CPCH01M10/052H01M10/0525H01M10/0565H01M12/08H01M2300/0085Y02E60/10
Inventor 李林刘凤泉周建军方芳
Owner BEIJING NORMAL UNIVERSITY
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