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Polymer electrolyte based on ionic liquid and preparation method and application thereof

A technology of ionic liquid and polymer, which is applied in the direction of solid electrolyte, electrolyte battery manufacturing, non-aqueous electrolyte, etc., can solve environmental damage and other problems, and achieve the effects of strong solid-state performance, high safety performance, and high solid-state performance

Inactive Publication Date: 2020-09-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the organic solvent is evaporated into the air, which will also cause certain damage to the environment.

Method used

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  • Polymer electrolyte based on ionic liquid and preparation method and application thereof
  • Polymer electrolyte based on ionic liquid and preparation method and application thereof
  • Polymer electrolyte based on ionic liquid and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A preparation method of an ionic liquid-based polymer electrolyte and a solid-state battery:

[0045] 1. Preparation of lithium lanthanum titanyl oxide (LLTO)

[0046] First weigh 1g lithium nitrate (LiNO3) and 6g lanthanum nitrate hexahydrate (LaNO3) 3 ·6H 2 (0), after it is packed into a beaker, dissolve with 10g absolute ethanol to obtain solution 1.

[0047] Then take another beaker, weigh 6g of tetrabutyl titanate and 2g of acetylacetone, and stir at 600r / min for 0.5h to obtain solution 2.

[0048] Solution 1 and solution 2 were mixed, and the mixed solution was stirred for 1 h.

[0049] The yellow solution obtained after the stirring was completed was dried in a blast drying oven at 70 degrees Celsius for 5 days, and then dried in a vacuum drying oven at 70 degrees Celsius for 24 hours to obtain a khaki xerogel.

[0050] The xerogel was put into a covered crucible and calcined at 900 °C for 2 h to obtain LLTO as a white powder.

[0051] The obtained white pow...

Embodiment 2

[0084] A preparation method of an ionic liquid-based polymer electrolyte and a solid-state battery:

[0085] Other experimental conditions are the same as in Example 1, and the difference from Example 1 is that in the preparation process of the polymer electrolyte in step 3, 0.2231g of nano-scale SiO is weighed 2 0.2231g of lithium lanthanum titanyl oxide (LLTO) and 0.1g of azobisisobutyronitrile (AIBN) were put into a 5ml glass bottle. Then add 0.3346g lithium salt LiTFSi and 0.35g ionic liquid [Py14]NTf2. The battery impedance test results are as follows figure 2 As shown, the ionic conductivity results are shown in Table 2.

Embodiment 3

[0087] A preparation method of an ionic liquid-based polymer electrolyte and a solid-state battery:

[0088] Other experimental conditions are the same as in Example 1, and the difference from Example 1 is that in the preparation process of the polymer electrolyte in step 3, 0.2071g of nano-scale SiO is weighed 2 , 0.1036g of lithium lanthanum titanyl oxide (LLTO) and 0.1g of azobisisobutyronitrile (AIBN) were put into a 0.5ml glass bottle. Then add 0.3107g lithium salt LiTFSi and 0.35g ionic liquid [Py14]NTf2. The battery impedance test results are as follows figure 2 As shown, the ionic conductivity results are shown in Table 2.

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Abstract

The invention discloses a polymer electrolyte based on ionic liquid and a preparation method and application thereof. The preparation method of the polymer electrolyte based on the ionic liquid comprises the following steps: mixing a polymer monomer with a lithium salt and an initiator, adding the ionic liquid, finally adding an inorganic oxide, and uniformly stirring to obtain the polymer electrolyte. The polymer monomer is methyl methacrylate, and the ionic liquid is one of [Py14]NTf2 and [EMIM]NTF2. The polymer electrolyte is high in safety coefficient and relatively high in ion mobility, the battery preparation period is remarkably shortened, and the battery preparation process is simple, time-saving and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of polymer electrolytes and solid-state batteries, in particular to an ionic liquid-based polymer electrolyte and its preparation method and application in solid-state batteries. Background technique [0002] Lithium batteries on the market today are widely used in various portable electronic devices and energy storage devices because of their advantages such as long service life, no memory effect, and high energy density. However, because the growth of lithium dendrites is easy to puncture the diaphragm, resulting in dangerous accidents due to short circuit, there are still certain safety issues in the use of lithium batteries. In addition, most lithium batteries on the market use organic electrolytes as electrolytes, and there are leaks. , explosion and other dangers. In order to solve the safety problem that the main lithium dendrites of the lithium battery puncture the separator and cause the battery to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/42H01M10/058H01M10/0525
CPCH01M10/0525H01M10/0565H01M10/058H01M10/4235H01M2300/0082Y02E60/10Y02P70/50
Inventor 袁文辉毕宛莹李莉何扬静
Owner SOUTH CHINA UNIV OF TECH
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