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A kind of oxide solid electrolyte sheet and its preparation method and application

A solid electrolyte and oxide technology, applied in the manufacture of electrolyte batteries, electrolytes, non-aqueous electrolyte batteries, etc., can solve the problems of defects in solid electrolyte sheets, through holes, affecting the performance of ultra-thin solid electrolytes, and improve the gas barrier. Sealing effect, large area span, and the effect of expanding the scope of application

Active Publication Date: 2021-11-09
CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Among the above three methods, the casting coating method is more suitable for the preparation of ultra-thin solid electrolyte sheets, but due to factors such as impurities, air bubbles, and operation, it is easy to cause defects or even through holes in the solid electrolyte sheets. flakes are more likely to appear, seriously affecting the performance of ultra-thin solid electrolyte

Method used

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  • A kind of oxide solid electrolyte sheet and its preparation method and application
  • A kind of oxide solid electrolyte sheet and its preparation method and application
  • A kind of oxide solid electrolyte sheet and its preparation method and application

Examples

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Embodiment 1

[0054] The present embodiment relates to a solid oxide electrolyte NASICON type LAGP (Li 1.5 Al 0.5 GE 1.5 (Po 4 ) 3 ) Sheet preparation, comprising the steps of:

[0055] 1) dispersion: 10g D50 is taken of the NASICON 500nm LAGP solid oxide electrolyte into a ball mill jar, followed by addition of a certain amount of the solvent (in this embodiment is a volume ratio of 1: 1 ethanol and xylene), addition of a dispersant, is added 80g zirconium ball, ball milled for 5 hours.

[0056] 2) Pulp: Take a certain amount of volume ratio of 1: 1 ethanol and xylene was poured into the cup glue, a plasticizer is added, then 1g of polyvinyl butyral (the PVB), carried out using a homogenizer glue. Open ball mill pot Step 1) was added to the prepared glue, milling continued 20h.

[0057] 3) Coating: Take a ball mill jar slurry is coated on a substrate, the coating having a thickness of 100 m, the solid electrolyte membrane will be completed together with the coated substrate to stand at ambient...

Embodiment 2

[0067] The present embodiment relates to a solid oxide electrolyte NASICON type LATP (Li 1.4 Al 0.4 Ti 1.6 (Po 4 ) 3 ) Sheet preparation, comprising the steps of:

[0068] 1) dispersion: Take 10g D50 of 300nm of the NASICON solid oxide electrolyte LATP into a ball mill jar, followed by addition of a certain amount of solvent, dispersant, was added 60g of zirconium balls, ball mill for 5 hours.

[0069] 2) Pulp: take a certain amount of the solvent system poured into plastic cups, a plasticizer was added, then 1g of polyvinyl alcohol (PVA), using a homogenizer for glue. Mill pot opening step 1), the prepared glue was added, ball milling continued for 16 h;

[0070] 3) Coating: Take a ball mill jar slurry is coated on a substrate, the coating having a thickness of 300 m, the solid electrolyte membrane will be completed together with the coated substrate to stand at ambient temperature drying solvent, and dried into a solid electrolyte green sheet, and dried 10h time hours, to obtain...

Embodiment 3

[0079] The present embodiment relates to a solid oxide electrolyte type Garnet LLZO (Li 7 La 3 Zr 2 O 12 ) Sheet preparation, comprising the steps of:

[0080] 1) dispersion: Take 10g D50 is 500nm Garnet type of solid oxide electrolyte LLZO (Li 7 La 3 Zr 2 O 12 ) Was placed in a ball mill jar, followed by adding a certain amount of solvent, dispersant, was added 90g of zirconium balls, milled for 4 hours.

[0081] 2) Pulp: take a certain amount of the solvent system poured into plastic cups, adding a plasticizer, then add 1.0g of polyvinyl butyral (the PVB), using a homogenizer for glue. Open ball mill pot Step 1) added and the prepared glue was added, continue milling 30h.

[0082] 3) Coating: Take a ball mill jar slurry is coated on a substrate, the coating having a thickness of 200 m, the solid electrolyte membrane will be completed together with the coated substrate to stand at ambient temperature drying solvent, and dried into a solid electrolyte green sheet, and dried 12h ti...

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Abstract

The invention belongs to the technical field of solid electrolytes, and in particular relates to an oxide solid electrolyte sheet and its preparation method and application. The method of the present invention comprises the following steps: bonding two or more layers of oxide solid electrolyte green sheets into one layer by means of thermal compression bonding. The present invention adopts a double-layer or multi-layer hot-compression composite method to obtain a dense oxide solid electrolyte sheet without through holes, which can effectively improve the gas-blocking and sealing effect of the dense solid electrolyte sheet.

Description

Technical field [0001] The present invention belongs to the field of solid electrolyte, and more particularly to an oxide solid electrolyte sheet and a preparation method thereof. Background technique [0002] Common inorganic oxide ceramic-based solid electrolytes, such as Nasicon structures 1.5 Al 0.5 GE 1.5 (Po 4 ) 3 (LagP) and Li 1.4 Al 0.4 Ti 1.6 (Po 4 ) 3 (Latp), the GARNET structure of LI 7 La 3 Zr 2 O 12 (LLZO), etc., has a characteristic that supports lithium ion conductivity and electron insulation. The thickness of the solid electrolyte sheet determines the internal resistance of the sample, the smaller the thickness, the small internal resistance, in order to reach the low internal resistance as much as possible, the thinner, the better the oxide solid electrolyte sheet, therefore developing ultra-thin solid The electrolyte sheet (film) is the core development of the full solid battery, and the difficulty is difficult. [0003] The preparation method of oxide solid el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1246H01M10/0562H01M10/058H01M12/06H01M12/08
CPCH01M8/1246H01M10/0562H01M10/058H01M12/06H01M12/08H01M2008/1293H01M2300/0074Y02E60/10Y02E60/50Y02P70/50
Inventor 赵尚骞张立孙浩博张刚宁朱秀龙杨容赵春荣武兆辉王建涛
Owner CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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