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Oxide solid electrolyte sheet and preparation method and application thereof

A solid electrolyte and oxide technology, applied in the manufacture of electrolyte batteries, electrolytes, non-aqueous electrolyte batteries, etc., can solve problems such as through holes, affecting the performance of ultra-thin solid electrolytes, and defects in solid electrolyte sheets, and achieve a large area span , Improve the gas barrier sealing effect and the uniform effect of hot pressing

Active Publication Date: 2020-05-08
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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  • Oxide solid electrolyte sheet and preparation method and application thereof
  • Oxide solid electrolyte sheet and preparation method and application thereof
  • Oxide solid electrolyte sheet and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0054] This embodiment relates to a kind of NASICON type oxide solid electrolyte LAGP (Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 ) a method for preparing thin slices, comprising the steps of:

[0055] 1) Dispersion: Take 10g of NASICON-type oxide solid electrolyte LAGP with a D50 of 500nm and put it into a ball mill jar, then add a certain amount of solvent (in this example, ethanol and xylene with a volume ratio of 1:1), add a dispersant, and add 80g zirconium balls, milled for 5 hours.

[0056] 2) Pulping: Take a certain amount of ethanol and xylene with a volume ratio of 1:1 and pour it into a plastic cup, add a plasticizer, then add 1g of polyvinyl butyral (PVB), and use a homogenizer to process Glue. Open the ball mill tank in step 1), add the prepared glue solution, and continue ball milling for 20 hours.

[0057] 3) Coating: Take the slurry in the ball mill tank and coat it on the substrate with a coating thickness of 100 μm. Place the coated solid electrolyte membrane toge...

Embodiment 2

[0067] This embodiment relates to a kind of NASICON type oxide solid electrolyte LATP (Li 1.4 Al 0.4 Ti 1.6 (PO 4 ) 3 ) a method for preparing thin slices, comprising the steps of:

[0068] 1) Dispersion: Take 10g of NASICON oxide solid electrolyte LATP with a D50 of 300nm and put it into a ball mill jar, then add a certain amount of solvent, add a dispersant, add 60g of zirconium balls, and mill for 5 hours.

[0069] 2) Pulping: Take a certain amount of solvent and pour it into the glue cup, add plasticizer, then add 1g of polyvinyl alcohol (PVA), and use a homogenizer to make glue. Open the ball mill tank in step 1), add the prepared glue solution, and continue ball milling for 16 hours;

[0070] 3) Coating: Take the slurry in the ball mill tank and coat it on the substrate with a coating thickness of 300 μm. Place the coated solid electrolyte membrane together with the substrate in a solvent environment to dry at room temperature, and dry to form a solid electrolyte gr...

Embodiment 3

[0079] This embodiment relates to a kind of Garnet type oxide solid electrolyte LLZO (Li 7 La 3 Zr 2 o 12 ) a method for preparing thin slices, comprising the steps of:

[0080] 1) Dispersion: Take 10g of Garnet type oxide solid electrolyte LLZO(Li 7 La 3 Zr 2 o 12 ) into a ball mill jar, then add a certain amount of solvent, add a dispersant, add 90g of zirconium balls, and ball mill for 4 hours.

[0081] 2) Pulping: Take a certain amount of solvent and pour it into the glue making cup, add plasticizer, and then add 1.0g of polyvinyl butyral (PVB), and use a homogenizer to make glue. Open the ball mill tank in step 1), add the prepared glue solution, and continue ball milling for 30 hours.

[0082] 3) Coating: Take the slurry in the ball mill tank and coat it on the substrate with a coating thickness of 200 μm. Place the coated solid electrolyte membrane together with the substrate in a solvent environment to dry at room temperature, and dry to form a solid electrolyt...

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Abstract

The invention belongs to the technical field of solid electrolyte, and particularly relates to an oxide solid electrolyte sheet and a preparation method and application thereof. The method disclosed by the invention comprises the following step: laminating two or more layers of oxide solid electrolyte raw sheets into one layer in a thermocompression bonding manner. According to the invention, a double-layer or multi-layer hot-pressing compounding mode is adopted, so the through-hole-free compact oxide solid electrolyte sheet can be obtained, and the gas barrier sealing effect of the compact solid electrolyte sheet can be effectively improved.

Description

technical field [0001] 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. Background technique [0002] Common inorganic oxide ceramic-based solid electrolytes, such as NASICON-structured Li 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), Garnet-structured Li 7 La 3 Zr 2 o 12 (LLZO), etc., have the characteristics of supporting lithium ion conduction and electronic insulation. The thickness of the solid electrolyte sheet determines the internal resistance of the sample. The smaller the thickness, the smaller the internal resistance. In order to achieve the lowest possible internal resistance, the thinner the oxide solid electrolyte sheet, the better. Therefore, the development of ultra-thin solid electrolyte Electrolyte sheet (membrane) is the core development content of all-solid-state batteries, which is rela...

Claims

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Application Information

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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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