Ion-conductive ceramic and method for producing same

A technology of conductivity and ceramics, which is applied in the field of synthesizing the above-mentioned new ceramics, can solve the problems of uneven particle size, crystallinity difference, instability, etc., and achieve the effect of high ionic conductivity and excellent electrochemical reaction

Pending Publication Date: 2022-07-08
SEVEN KING ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these oxide-based solid electrolytes have Ti that causes a reduction reaction at the cathode, or have 7 lithium, are unstable in air and generate gas
In addition, most of these are produced by solid-state methods, so the particles are not uniform, and there are many differences in crystallinity depending on the heat treatment temperature

Method used

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  • Ion-conductive ceramic and method for producing same
  • Ion-conductive ceramic and method for producing same
  • Ion-conductive ceramic and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The synthetic chemical composition is Li 1+x Al x Si 2-x P 3 O 12 (x=0.3) NASICON structure oxide-based conductive ceramics

[0055] LiCl, Al (NO 3 ) 3 ·9H 2 O, NH 4 H 2 PO 4 , C 8 H 20 O 4 After the Si is calculated as stoichiometric, each is mixed in a molar ratio of 1.3:0.3:3:1.7. After that, zirconia balls with diameters of 5 mm and 10 mm were prepared at a ratio of 2:1, and placed in a prepared 500-ml container, so that the volume ratio of the mixed sample and zirconia balls was 1:1. The rotation speed of the ball mill was 200 to 300 RPM, and the ball milling was performed for 24 hours. After ball milling for 24 hours, the zirconia balls were removed. After that, a heat treatment was performed at 400° C. for 3 hours. The chemical composition of Li is synthesized by grinding and pulverizing the heat-treated powder in a mortar and then performing a secondary heat treatment at 900°C for 4 hours. 1+x Al x Si 2-x P 3 O 12 (x=0.3) oxide-based conduct...

Embodiment 2

[0057] The synthetic chemical composition is Li 1+x Zr 2 Si x P 3-x O 12(x=2) NASICON structure oxide-based conductive ceramics

[0058] Will Li 3 PO 4 , SiO 2 , ZrO 2 Each was mixed in a 1:2:2 molar ratio after stoichiometric calculations. After that, zirconia balls with diameters of 5 mm and 10 mm were prepared at a ratio of 2:1, and placed in a prepared 500-ml container, so that the volume ratio of the mixed sample and zirconia balls was 1:1. The rotation speed of the ball mill was 200 to 300 RPM, and the ball milling was performed for 10 hours. After ball milling for 10 hours, the zirconia balls were removed. After that, a heat treatment was performed at 400° C. for 5 hours. The chemical composition is Li by grinding and pulverizing the heat-treated powder in a mortar, followed by a secondary heat treatment at 1100°C for 12 hours. 1+x Zr 2 Si x P 3-x O 12 The oxide-based conductive ceramic of the NASICON structure of (x=2). figure 2 SEM images of the cond...

Embodiment 3

[0060] The synthetic chemical composition is Li 1+x Al x Si 2-x P 3 O 12 (x=0.3) NASICON structure oxide-based conductive ceramics

[0061] LiCl, Al (NO 3 ) 3 ·9H 2 O, NH 4 H 2 PO 4 , C 8 H 20 O 4 After Si was calculated according to the stoichiometry, each was placed in 500 ml of distilled water in a molar ratio of 1.3:0.3:3:1.7. After that, zirconia balls with diameters of 5 mm and 10 mm were prepared at a ratio of 2:1, and placed in a prepared 500-ml container, so that the volume ratio of the mixed sample and zirconia balls was 1:1. The rotation speed of the ball mill was 200 to 300 RPM, and the ball milling was performed for 24 hours. After ball mill mixing for 24 hours, the zirconia balls were removed and dried at 80°C for 12 hours. After that, a heat treatment was performed at 400° C. for 3 hours. The chemical composition of Li is synthesized by grinding and pulverizing the heat-treated powder in a mortar and then performing a secondary heat treatment at ...

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Abstract

The invention relates to a ceramic solid electrolyte for improving safety and a synthesis method thereof. The ceramic solid electrolyte is a core structural element of an all-solid-state lithium secondary battery. The invention relates to a compound represented by the chemical formula Li1 + xAlxX2-xP3O12 (X is Zr, Si, Sn or Y, 0lt; xlt; (2) or Li1 + xZr2XxP3-xO12 (X = Si, Sn, Ge or Y, and x is greater than or equal to 1.5 and less than or equal to 2.3). The present invention also relates to a method for producing the oxide-based conductive ceramic having the novel NASICON structure.

Description

technical field [0001] The present invention relates to an oxide-based ceramic having a NASICON structure having lithium ion conductivity. The lithium ion conductive ceramic of the present invention is a substance of a novel chemical structure and has excellent ionic conductivity. The present invention also relates to a method for synthesizing the above-mentioned novel ceramics. According to a preferred synthesis method of the present invention, the above-mentioned novel ceramics are synthesized by mixing the raw materials with water as a solvent and by a rotary concentration process or a spray drying process. The ceramics produced in this way become ceramic solid electrolyte particles in which the particles are spherical and uniformly distributed. The ceramic particles of the present invention exhibit excellent electrochemical properties when fabricated into electrolytes and suitable for use in batteries. Background technique [0002] The lithium secondary battery market...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562
CPCC01B25/45H01M10/0562H01M10/052H01B1/06C04B35/447C04B2235/3217C04B2235/3248C04B2235/3203C04B2235/3418C04B2235/3293C04B2235/3225C04B2235/3287C04B35/62625C04B35/62645C04B35/62675Y02E60/10H01M2300/0068C04B35/01C04B35/48H01B1/08H01M2300/0071C04B2235/3244C04B2235/764C01P2002/50C01P2002/72C01P2004/03C01P2006/40
Inventor 金在光
Owner SEVEN KING ENERGY
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