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Method for preparing solid electrolyte and all solid state battery comprising same

A solid electrolyte and battery technology, which is applied in the manufacture of solid electrolytes, electrolyte batteries, non-aqueous electrolyte batteries, etc., can solve the problems of limitation, difficulty in selecting solvent moisture damage, and difficulty in micronization, etc., to improve performance, improve productivity, Deterioration prevention effect

Active Publication Date: 2018-11-23
HYUNDAI MOTOR CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, material properties such as difficult micronization (due to the high ductility of sulfide-based solid electrolytes), difficult choice of solvent, and susceptibility to moisture damage act as fatal limitations in improving existing processes.

Method used

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  • Method for preparing solid electrolyte and all solid state battery comprising same
  • Method for preparing solid electrolyte and all solid state battery comprising same
  • Method for preparing solid electrolyte and all solid state battery comprising same

Examples

Experimental program
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Effect test

Embodiment 1

[0107] Use Li respectively 2 S and P 2 S 5 as the first raw material and the second raw material. The first raw material and the second raw material were weighed in a molar ratio of 75:25, and then dispersed in a moisture-free ethyl propionate solvent. At this time, the first raw material and the second raw material were added to 100 ml of solvent so as to have a concentration of 100 mg. A slurry was obtained by stirring the mixture with a magnetic bar for about 12 hours.

[0108] LiNi as the positive electrode active material 0.6 co 0.2 mn 0.2 o 2 (NCM622) was added to the slurry, and Super P carbon black as a conductive material was also added thereto. At this time, the positive electrode active material and the conductive material were weighed and added so that the mass ratio of the positive electrode active material, solid electrolyte, and conductive material was 65:25:10.

[0109] The ingredients were evenly mixed by stirring the slurry with a magnetic bar for ab...

Embodiment 2

[0114] Prepare the half-cell of the all-solid-state battery pack with the same materials and methods as in Example 1, except that when compared with Example 1, the mass ratio of the positive electrode active material, solid electrolyte and conductive material is 80:10 :10, weighing and adding positive electrode active material and conductive material.

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Abstract

The invention discloses a method for preparing a solid electrolyte and an all solid state battery comprising the same. Specifically, the invention provides a method for preparing a solid electrolyte for an all-solid state battery, the method including obtaining a slurry by dispersing a first raw material comprising lithium sulfide and a second raw material selected from the group consisting of silicon sulfide, phosphorus sulfide, germanium sulfide, boron sulfide, and a combination thereof in a solvent; and drying the slurry.

Description

technical field [0001] The present invention relates to a non-abrasive method for the preparation of a solid electrolyte and a method for the preparation of an all-solid-state battery having a densified positive electrode comprising the solid electrolyte. Background technique [0002] As with lithium-ion secondary batteries, all-solid-state batteries using solid electrolytes are known. An all-solid-state battery pack includes an electrolyte layer containing a solid electrolyte, electrodes (a positive electrode and a negative electrode) formed on both surfaces of the electrolyte layer, and a current collector contacting each electrode. As the solid electrolyte, a sulfide-based solid electrolyte with high lithium ion conductivity is generally used. [0003] As the positive electrode active material, a transition metal oxide containing lithium ions is used, and since the positive electrode active material has low lithium ion conductivity, the positive electrode generally conta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/0562
CPCH01M10/0562H01M10/058H01M2300/0068H01M4/043H01M4/0471H01M4/136H01M4/1397H01M4/364H01M10/0525Y02E60/10Y02P70/50H01M4/1391H01M10/052H01M4/505H01M4/525H01M4/625
Inventor 林栽敏成柱咏张容准郑燻基金炯哲E·D·郑尹彬娜
Owner HYUNDAI MOTOR CO LTD
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