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Solid electrolyte and preparation method and application thereof

A solid electrolyte and halogen atom technology, applied in the field of lithium-ion batteries, can solve problems such as explosion, combustion, and corrosion

Inactive Publication Date: 2021-01-26
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, due to the use of flammable organic liquid electrolytes in existing lithium-ion batteries, there are safety hazards such as leakage, corrosion, combustion and even explosion.

Method used

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  • Solid electrolyte and preparation method and application thereof
  • Solid electrolyte and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] This embodiment provides a kind of solid electrolyte, and described solid electrolyte is Li 5.4 P.S. 4.4 Cl 1.6 .

[0059] The preparation method of the above-mentioned solid electrolyte comprises the following steps:

[0060] (1) In an argon atmosphere protection, Li with a purity of 99.9% 2 S, P 2 S 5 and LiCl were weighed according to the molar ratio of 47.5:12.5:40, and were ground at 500 rpm for 15 hours by a high-energy ball mill with a ball-to-material mass ratio of 45:1 under the condition that the water content was 9 ppm, and mixed to obtain the first powder;

[0061] (2) Compressing the powder primary material at a pressure of 10MPa to obtain a flake primary material;

[0062] (3) Raise the temperature of the flake raw material to 470°C at a rate of 2°C / min, sinter for 4 hours, cool to room temperature, take out the sintered product and grind it evenly under the condition of water content of 90ppm to obtain Li 5.4 P.S. 4.4 Cl 1.6 .

Embodiment 2

[0064] This embodiment provides a kind of solid electrolyte, and described solid electrolyte is Li 6 P.S. 5 Br.

[0065] The preparation method of the above-mentioned solid electrolyte comprises the following steps:

[0066] (1) In an argon atmosphere protection, Li with a purity of 99.8% 2 S, P 2 S 5 and LiBr were weighed according to the molar ratio of 62.5:12.5:25, and were ground at 500 rpm for 15 hours by a high-energy ball mill with a ball-to-material mass ratio of 45:1 under the condition that the water content was 9 ppm, and mixed to obtain the first powder;

[0067] (2) Compressing the powder primary material at a pressure of 10MPa to obtain a flake primary material;

[0068] (3) Raise the temperature of the flake raw material to 550°C at a rate of 2°C / min, sinter for 4 hours, cool to room temperature, take out the sintered product and grind it evenly under the condition of water content of 90ppm to obtain Li 6 P.S. 5 Br.

Embodiment 3

[0070] This embodiment provides a kind of solid electrolyte, and described solid electrolyte is Li 6.6 P.S. 5.6 f 0.4 .

[0071] The preparation method of the above-mentioned solid electrolyte comprises the following steps:

[0072] (1) In an argon atmosphere protection, Li with a purity of 99.7% 2 S, P 2 S 5 Weigh with LiF according to the molar ratio of 77.5:12.5:10, and grind at 500rpm for 15h by a high-energy ball mill with a mass ratio of ball to material of 45:1 under the condition that the water content is 9ppm, and mix to obtain the first powder;

[0073] (2) Compressing the powder primary material at a pressure of 10MPa to obtain a flake primary material;

[0074] (3) Raise the temperature of the flake raw material to 520°C at a rate of 2°C / min, sinter for 4 hours, cool to room temperature, take out the sintered product and grind it evenly under the condition of water content of 90ppm to obtain Li 6.6 P.S. 5.6 f 0.4 .

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Abstract

The invention relates to a solid electrolyte and a preparation method and application thereof, the solid electrolyte is Li7-xPS6-xMx, wherein parameters are as shown in the description. The lithium ion conductivity of the solid electrolyte is relatively high because halogen provides a multi-dimensional channel for lithium ion transmission, the activity space of lithium ions is increased, and the lithium ion conductivity is improved.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a solid electrolyte and its preparation method and application. Background technique [0002] In the 21st century, ecological problems such as serious environmental pollution and the energy crisis of the increasingly scarce traditional fossil energy have emerged around the world, which have increasingly become prominent problems restricting the sustainable development of human society. Therefore, it is imperative to accelerate the development and utilization of green and clean energy, establish an efficient, safe, economical and clean energy system, reduce the dependence of traditional industries and automobiles on fossil energy, and achieve sustainable development of society. [0003] Electrochemical energy storage technology is crucial to the utilization of intermittent clean renewable energy such as solar energy and wind energy, and is also the core of zero-emission pure e...

Claims

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Application Information

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IPC IPC(8): H01M10/0562H01M10/0525C01B25/08
CPCC01B25/08H01M10/0525H01M10/0562H01M2300/0068H01M2300/008Y02E60/10
Inventor 陈少杰王磊黄海强
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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