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Method for preparing ceramic solid electrolyte for lithium secondary battery

A technology of solid electrolyte and manufacturing method, which is applied in the direction of secondary batteries, electrolytes, lithium batteries, etc., can solve the problems of large differences in crystallinity and uneven particles, and achieve the effect of uniform shape and distribution, and high performance

Inactive Publication Date: 2020-11-13
SEVEN KING ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most of them are produced by solid phase method, the particles are not uniform, and the crystallinity varies greatly depending on the heat treatment temperature

Method used

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  • Method for preparing ceramic solid electrolyte for lithium secondary battery
  • Method for preparing ceramic solid electrolyte for lithium secondary battery
  • Method for preparing ceramic solid electrolyte for lithium secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The synthesis of LATP solid electrolyte is that it will be possible to form Li 1.3 al 0.3 Ti 1.7 (PO 4 ) 3 Proportion of LiCl, Al(NO 3 ) 3 9H 2 O, NH 4 h 2 PO 4 , Ti(OC 4 h 9 ) 4 After stoichiometric calculation (1 mole molecular weight of LiCl=42.39g / mol, A1(NO 3 ) 3 9H 2 1 molar molecular weight of O = 375.13g / mol, NH 4 h 2 PO 4 The 1 mole molecular weight of =115.03g / mol, Ti(OC 4 h 9 ) 4 1 molar molecular weight = 340.32 g / mol), 0.1 mole of each substance was added to 250 ml of distilled water. After that, zirconia balls with a diameter of 5 mm and 10 mm were prepared at a ratio of 2:1, and put into a prepared 500 ml container so that the volume ratio of the mixed sample and zirconia balls became 1:1. The rotation speed of the ball mill was 200RPM-300RPM, and the ball mill was carried out for 24 hours. For the ball-milled samples, after removing the zirconia balls, carry out the first drying by means of rotary concentration or spraying, and full...

Embodiment 2

[0058] The synthesis of LAGP solid electrolyte is that it will be possible to form Li 1.3 al 0.3 Ge 1.7 (PO 4 ) 3 Proportion of LiCl, Al(NO 3 ) 3 9H 2 O, NH 4 h 2 PO 4 、GeO 2 After stoichiometric calculation (1 mole molecular weight of LiCl=42.39g / mol, A1(NO 3 ) 3 9H 2 1 molar molecular weight of O = 375.13g / mol, NH 4 h 2 PO 4 The molecular weight of 1 mole = 115.03g / mol, GeO 2 1 molar molecular weight = 104.63 g / mol), 0.1 mole of each substance was added to 250 ml of distilled water.

[0059] After that, zirconia balls with a diameter of 5 mm and 10 mm were prepared at a ratio of 2:1, and put into a prepared 500 ml container so that the volume ratio of the mixed sample and zirconia balls became 1:1. The rotation speed of the ball mill was 200RPM-300RPM, and the ball mill was carried out for 24 hours. For the ball-milled samples, after removing the zirconia balls, carry out the first drying by means of rotary concentration or spraying, and fully carry out the...

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Abstract

The present invention relates to a method for preparing a ceramic solid electrolyte having a uniform particle distribution, excellent crystallinity, and high ionic conductivity. A first step for preparing ceramic solid electrolyte particles can be a step for adding a raw material to distilled water and mixing the raw material and the distilled water to prepare a solid electrolyte precursor. A second step can be a step for mixing the solid electrolyte precursor by means of a ball-mill. A third step can be an additional step for primarily drying by spin-concentrating or spraying. A fourth step can be a step for conducting secondary drying in a drying device for at least 24 hours at 80 DEG C to completely remove the distilled water solvent. A fifth step can be a step for primarily calcining ceramic particles in a heat treatment device and secondarily firing the ceramic particles in the heat treatment device.

Description

technical field [0001] The invention relates to a method for manufacturing a ceramic solid electrolyte for a solid lithium secondary battery. Furthermore, the present invention relates to a method for producing a ceramic solid electrolyte having uniform particle distribution, excellent crystallinity, and high ion conductivity. The ceramic solid electrolyte of the present invention may include oxides, phosphates, and sulfides. Background technique [0002] At present, the market for lithium secondary batteries is not limited to small IT equipment, but has expanded to medium and large markets such as electric vehicles and ESS systems. Such a lithium battery should have high instantaneous power, excellent reversibility during charging and discharging, high energy density, and excellent reproducibility and stability. In order to respond to the trend of further miniaturization and thin film reduction, the flexibility of form and processing also plays an important factor. In pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/052C01B25/45
CPCC01B25/45H01M10/0562Y02E60/10H01M10/0525H01M10/052H01M2300/0071C01P2002/72C01P2004/03C01P2006/40
Inventor 孙正宇孙志沅金宰光
Owner SEVEN KING ENERGY
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