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A kind of glassy solid electrolyte and preparation method thereof

A glassy solid and electrolyte technology, applied in glass manufacturing equipment, glass pressing, glass molding, etc., can solve the problems of poor chemical stability and low ion conductivity, and achieve the effect of improving conductivity

Active Publication Date: 2021-11-02
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conductivity of the sulfide glass electrolyte is higher than that of the oxide glass electrolyte (~10 -2 S cm -1 ), but the chemical stability of the sulfide glass electrolyte is poor, and it is easy to absorb water and release hydrogen sulfide gas
The glassy lithium oxide solid electrolyte has good stability, and only lithium ions can migrate in its network structure. However, the ionic conductivity of the current oxide glass electrolyte is generally very small, and the room temperature conductivity is only 10. -7 ~10 -8 S cm -1 , which has become the biggest limitation in its commercial development and application in solid-state lithium-ion batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A glass-state solid electrolyte parts comprising the following components by weight: 10 parts of lithium oxide, lanthanum oxide, 8 parts, 18 parts of boron oxide, 10 parts silica and 20 parts of zirconium oxide.

[0027] Method for preparing the glassy solid electrolyte, comprising the steps of:

[0028] (1) lithium carbonate, lanthanum oxide, zirconium oxide, silicon dioxide and boric acid were added in a vibrating ball mill, ball mill 0.1H, to obtain fine powder; wherein the milling media and mill pot made of zirconia;

[0029] (2) a step of powder (1) after milling was heated to 1150 ℃, heating rate of 4 ℃ / min, to reach a molten state, the molten glass obtained, and incubated 0.5H;

[0030] (3) The mold was preheated to 300 ℃, then the step (2) after the mold after the molten glass was poured into preheated incubated obtained within 10 seconds, the 1mm thick pressed into a solid glass electrolytes;

[0031] (4) The step (3) into the insulation 0.5h electrolyte resultin...

Embodiment 2

[0033] A glass-state solid electrolyte parts comprising the following components by weight: 12 parts of lithium oxide, 10 parts lanthanum oxide, boron oxide, 29 parts 17 parts 33 parts silica and zirconia.

[0034] Method for preparing the glassy solid electrolyte, comprising the steps of:

[0035] (1) lithium carbonate, lanthanum oxide, zirconium oxide, silicon dioxide and boric acid were added in a vibrating ball mill, IH milling, to obtain fine powder; wherein the milling media and mill pot made of zirconia;

[0036] (2) a step of powder (1) after milling was heated to 1250 deg.] C, heating rate of 5 ℃ / min, to reach a molten state, the molten glass obtained, and incubated 2H;

[0037] (3) The mold was preheated to 500 ℃, then the step (2) of molten glass mold was obtained after incubation was poured within 20 seconds of preheating, 1mm thick pressed into a solid glass electrolytes;

[0038] (4) The step (3) an electrolyte into the resulting glass at a temperature of 550 ℃ inc...

Embodiment 3

[0040] A glass-state solid electrolyte parts comprising the following components by weight: 12 parts of lithium oxide, 10 parts lanthanum oxide, boron oxide, 29 parts, 33 parts and 17 parts of silica, zirconia; the parts by weight of component further comprises: strontium oxide 3 parts, 5 parts of niobium pentoxide, tungsten trioxide 3 parts, 2 parts of yttrium oxide and 3 parts of antimony trioxide.

[0041] Method for preparing the glassy solid electrolyte, comprising the steps of:

[0042] (1) lithium carbonate, lanthanum oxide, zirconium oxide, boric acid, silica, strontium oxide, niobium pentoxide, tungsten oxide, yttrium oxide, antimony trioxide was added and a vibration ball mill, IH milling, to obtain fine powder; wherein , and the mill pot made of zirconia milling media;

[0043] (2) a step of powder (1) after milling was heated to 1250 deg.] C, heating rate of 5 ℃ / min, to reach a molten state, the molten glass obtained, and incubated 2H;

[0044] (3) The mold was prehe...

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Abstract

The invention discloses a glassy solid electrolyte, which comprises the following components in parts by weight: 10-22 parts of lithium oxide, 8-12 parts of lanthanum oxide, 18-35 parts of boron oxide, 20-35 parts of silicon dioxide and zirconia or 10-18 parts of hafnium dioxide; also includes the following components by weight: 0-5 parts of strontium oxide, 0-10 parts of niobium pentoxide, 0-5 parts of tungsten trioxide, 0-5 parts of yttrium oxide and 0 to 3 parts of antimony. Also provided is a method for preparing the glassy solid electrolyte. The invention utilizes the phase separation of borosilicate glass, the support of large-radius ions and the coordination of unequal ions to improve the room temperature ionic conductivity of the oxide glass solid electrolyte of lithium ion batteries, and improve the room temperature ionic conductivity of the oxide glass electrolyte. conductivity.

Description

Technical field [0001] Technical Field The present invention relates to a solid electrolyte, particularly, to a glassy solid electrolyte and preparation method thereof. Background technique [0002] Lithium solid electrolyte according to their composition and structure of the solid electrolyte into a crystalline, glassy two kinds of electrolytes, solid electrolytes and chemical composition of the same crystalline glassy solid electrolyte compared to the absence of grain boundaries affect, nonporous influence ion transport number close to 1, the sheet can be made directly, easy molding process, by continuously adjusting the chemical composition and thermal history control material to study the relationship between the composition and structure of its mechanism of electrically conductive material. [0003] Glassy solid electrolyte into an oxide species: sulfide glass electrolyte, the electrolyte oxide glass. Sulfide glass oxide glass as compared to the electrolyte conductivity grea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/068C03B11/00H01M10/0562H01M10/0525
CPCC03B11/00C03C3/068H01M10/0525H01M10/0562Y02E60/10
Inventor 张骞蒙福海兰超波罗诗健钟盛文
Owner JIANGXI UNIV OF SCI & TECH
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