Solid electrolyte membrane, preparation method of solid electrolyte membrane and lithium ion battery

A solid electrolyte membrane and lithium-ion battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems affecting the electrochemical performance of solid lithium-ion batteries, high ion migration resistance, etc., and achieve easy promotion and high mechanical strength , The effect of simple preparation process

Inactive Publication Date: 2016-04-06
SHANDONG HONGZHENG BATTERY MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among a wide variety of solid electrolytes, the inorganic sulfur-based glass-ceramic electrolytes that are closest to the practical level are very easy to react with trace amounts of water and electrode active mat...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method of a lithium-ion battery solid electrolyte membrane, comprising the following steps:

[0017] (1) Take an appropriate amount of glass ceramic electrolyte powder Li 2 S-P 2 S 5 Uniformly disperse in anhydrous toluene solution, then spread it evenly on the aramid non-woven fabric with a scraper, and fully dry it in an inert environment.

[0018] (2) The dried non-woven fabric coated with glass-ceramic electrolyte is cold-pressed to obtain Li 2 S-P 2 S 5 / Non-woven membrane.

[0019] (3) Dissolve an appropriate amount of PEO in anhydrous acetonitrile, then add an appropriate amount of LiTFSI, and ultrasonically treat until the PEO and LiTFSI are completely dissolved, and the molar ratio of PEO to LiTFSI is 1:7.

[0020] (4) the solution obtained in step (3) is uniformly arranged on the Li obtained in step (2) by electrospinning 2 S-P 2 S 5 On the non-woven fabric membrane, after drying in an inert atmosphere, the solid electrolyte membrane M1 ...

Embodiment 2

[0026] A preparation method of a lithium-ion battery solid electrolyte membrane, comprising the following steps:

[0027] (1) Take an appropriate amount of glass ceramic electrolyte powder Li 2 S-P 2 S 5 Uniformly disperse in anhydrous toluene solution, then spread it evenly on the aramid non-woven fabric with a scraper, and fully dry it in an inert environment.

[0028] (2) The dried non-woven fabric coated with glass-ceramic electrolyte is cold-pressed to obtain Li 2 S-P 2 S 5 / Non-woven membrane.

[0029] (3) Dissolve an appropriate amount of PMMA in anhydrous acetonitrile, then add an appropriate amount of LiFSI, and ultrasonically treat until PMMA and LiFSI are completely dissolved, and the molar ratio of PMMA to LiFSI is 1:8.

[0030] (4) the solution obtained in step (3) is uniformly arranged on the Li obtained in step (2) by electrospinning 2 S-P 2 S 5 On the non-woven fabric membrane, after drying in an inert atmosphere, the solid electrolyte membrane M2 of t...

Embodiment 3

[0033] A preparation method of a lithium-ion battery solid electrolyte membrane, comprising the following steps:

[0034] (1) Take an appropriate amount of glass ceramic electrolyte powder Li 10 GeP 2 S 12 Uniformly disperse in anhydrous toluene solution, then spread it evenly on the aramid non-woven fabric with a scraper, and fully dry it in an inert environment.

[0035] (2) The dried non-woven fabric coated with glass-ceramic electrolyte is cold-pressed to obtain Li 10 GeP 2 S 12 / Non-woven membrane.

[0036] (3) Dissolve an appropriate amount of PEO in anhydrous acetonitrile, then add an appropriate amount of LiTFSI, and ultrasonically treat until the PEO and LiTFSI are completely dissolved, and the molar ratio of PEO to LiTFSI is 1:7.

[0037] (4) the solution obtained in step (3) is evenly arranged on the Li obtained in step (2) by the liquid phase spraying method. 10 GeP 2 S 12 On the non-woven fabric membrane, after drying in an inert atmosphere, the solid ele...

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Abstract

The invention discloses a solid electrolyte membrane of a lithium ion battery, and relates to the field of lithium ion batteries. The solid electrolyte membrane is composed of a glass ceramic electrolyte and a coating layer with which the surface of the glass ceramic electrolyte is coated. The coating layer is prepared from lithium salt and a polymer material at the molar ratio of 1:5-1:10. The electrolyte membrane can reduce the interface impedance of the full-solid-state lithium ion battery to a great extent, so that the cycling stability of the full-solid-state lithium ion battery is improved, and the service life of the full-solid-state lithium ion battery is prolonged. The invention further discloses a preparation method of the solid electrolyte membrane and the full-solid-state lithium ion battery comprising the solid electrolyte membrane. The solid electrolyte membrane of the lithium ion battery is high in mechanical strength and excellent in electrochemical performance, and meanwhile the preparation technology is simple and convenient to popularize.

Description

Technical field: [0001] The invention specifically relates to a solid electrolyte membrane, a preparation method thereof and a solid lithium ion battery containing the electrolyte membrane. Background technique: [0002] Since the birth of the first commercially applied lithium-ion battery in the 1990s, lithium-ion batteries have been used in personal computers, mobile electronic devices, electric vehicles, and power tools due to their advantages such as high energy density, high output power, and no memory effect. , energy storage equipment and other fields have been widely used. With the advancement of technology, the electrochemical properties of lithium-ion batteries, such as energy density and cycle performance, have also been greatly improved. However, since liquid organic electrolytes are still widely used in current lithium-ion batteries, the problem of their safety performance has not been fundamentally resolved. [0003] Unlike traditional lithium-ion batteries, ...

Claims

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Application Information

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IPC IPC(8): H01M10/056H01M10/0562H01M10/0525
CPCH01M10/0525H01M10/056H01M10/0562Y02E60/10
Inventor 王群峰谷秀娟董苗苗梁振洋吴楚伟叶付臣
Owner SHANDONG HONGZHENG BATTERY MATERIAL TECH
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