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Argyrodite type sulfide electrolyte and preparation method thereof

A technology of sulfide electrolyte and silver-sulfur-germanium ore, which can be used in circuits, electrical components, secondary batteries, etc., can solve problems such as potential safety hazards, and achieve the effects of enhancing compatibility, high ionic conductivity, and accelerating practical application development.

Pending Publication Date: 2022-07-08
SHANGHAI FIRM-LITHIUM NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, commercialized batteries mainly use organic liquid electrolytes as lithium ion transmission media, but organic liquid electrolytes are volatile and flammable, which poses safety hazards during battery charging and discharging.

Method used

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  • Argyrodite type sulfide electrolyte and preparation method thereof

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[0029] According to one aspect of the present invention, the present invention proposes an arginine-type sulfide electrolyte and a preparation method thereof. According to an embodiment of the present invention, it includes:

[0030] (1) Prepare raw materials;

[0031] (2) ball mill mixing;

[0032] (3) tableting;

[0033] (4) Quartz tube packaging;

[0034] (5) High temperature sintering treatment in muffle furnace.

[0035] Thus, the present invention prepares a kind of silver-germanite type sulfide solid-state electrolyte Li by ball milling and sintering6+x Zr x P 1- x S 5 PF 6 . The products obtained by the invention have higher ionic conductivity, so that the practical application development of high-performance solid-state batteries can be accelerated.

[0036] According to a specific embodiment of the present invention, the Li source used in the above-mentioned preparation of raw materials may be LiPF 6 Thereby, an arginite-type sulfide solid-state electrolyte...

Embodiment 1

[0049] Weigh the pure reagent ZrS according to the required stoichiometric ratio 0.1:0.95:2:5.05 2 , P 2 S 5 , LiPF 6 and Li 2 S hand milled for 25 minutes after mixing. Put it into a zirconia ball milling jar, add zirconia ball milling at a mass ratio of 1:50, set the speed of the ball mill to 370 rpm, and set the ball milling time to 40 hours. Then scrape off the samples attached to the jar wall, and sieve them with a 1000-mesh sieve. A well-mixed precursor can be obtained. Then tablet (diameter 12mm) was pressed with a pressure of 450MPa. Load the quartz tube into the sealed tube. The temperature was raised to 475 °C at a rate of 1 / min, kept for 8 h, and Li was obtained after cooling. 6.05 Zr 0.05 P 0.95 S 5 PF 6 Solid electrolyte powder. It can be found from the XRD that the solid electrolyte powder prepared by this method is a sapphire-type cubic phase, with good crystal form and high purity. The solid electrolyte powder was pressed under a pressure of 580Mpa...

Embodiment 2

[0052] Weigh the pure reagent ZrS according to the required stoichiometric ratio of 0.2:0.9:2:5.1 2 , P 2 S 5 , LiPF 6 and Li 2 S hand milled for 25 minutes after mixing. Put it into a zirconia ball milling jar, add zirconia ball milling at a mass ratio of 1:50, set the speed of the ball mill to 370 rpm, and set the ball milling time to 40 hours. Then scrape off the samples attached to the jar wall, and sieve them with a 1000-mesh sieve. A well-mixed precursor can be obtained. Then tablet (diameter 12mm) was pressed with a pressure of 450MPa. Load the quartz tube into the sealed tube. The temperature was raised to 475 °C at a rate of 1 / min, kept for 8 h, and Li was obtained after cooling. 6.1 Zr 0.1 P 0.9 S 5 PF 6 Solid electrolyte powder. It can be found from the XRD that the solid electrolyte powder prepared by this method is a sapphire-type cubic phase, with good crystal form and high purity. The solid electrolyte powder was pressed under a pressure of 580Mpa a...

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Abstract

The invention discloses argyrodite type sulfide solid electrolyte and a preparation method thereof, and belongs to the technical field of battery materials. The sulfide electrolyte in the product developed by the invention is Li < 6 + x > Zr < x > P < 1-x > S5PF < 6 >. The preparation method comprises the following steps: manually grinding and mixing the raw materials in a glove box filled with inert gas, and then filling the mixture into a ball milling tank for ball milling; then tabletting the sample subjected to ball milling; and finally, sintering to obtain the target sulfide solid electrolyte. The obtained product has higher ionic conductivity, so that the practical application and development of the high-performance solid-state battery are accelerated.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to an arginite-type sulfide electrolyte and a preparation method thereof. Background technique [0002] As an important part of the battery, the electrolyte plays the role of transporting ions between the positive and negative electrodes. Selecting the appropriate electrolyte is the key to improving the battery power density, energy density, cycle life, reducing the internal resistance of the battery, and ensuring its safety. . Electrolytes generally include liquid electrolytes, gel electrolytes and solid electrolytes. At present, commercial batteries mainly use organic liquid electrolytes as lithium ion transport media, but the organic liquid electrolytes themselves are volatile and flammable, so there are potential safety hazards in the battery charging and discharging process. Compared with organic liquid electrolytes, solid electrolytes have obvious characteristics a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562
CPCH01M10/0562Y02P70/50
Inventor 张希朱金辉陈振营
Owner SHANGHAI FIRM-LITHIUM NEW ENERGY TECH CO LTD
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