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Molybdenum-doped argyrodite type sulfide electrolyte and preparation method thereof

A technology of sulfide electrolyte and sulfide silver germanium ore, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of accelerating the practical application development of high-performance solid-state batteries, poor chemical stability of electrolytes, etc., and achieve accelerated practical application. Effects of development, good electrochemical stability, high ionic conductivity

Pending Publication Date: 2022-08-09
SHANGHAI FIRM-LITHIUM NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor chemical stability of the electrolyte in the prior art, and to provide a molybdenum-doped argentgermanium type sulfide electrolyte and a preparation method thereof. The product obtained in the present invention has higher ion conductivity, thereby Accelerating the development of practical applications for high-performance solid-state batteries

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  • Molybdenum-doped argyrodite type sulfide electrolyte and preparation method thereof
  • Molybdenum-doped argyrodite type sulfide electrolyte and preparation method thereof

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preparation example Construction

[0032] 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:

[0033] (1) Prepare the raw materials in an argon-filled glove box, mix them thoroughly to obtain the mixture powder and seal it in a ball mill to avoid contact with air;

[0034] (2) mixing the ball mill tank on the planetary ball mill to obtain preliminary solid electrolyte powder;

[0035] (3) compressing the solid electrolyte powder obtained in step (2) under a pressure of 350 MPa to obtain a solid electrolyte sheet;

[0036] (4) encapsulate the obtained solid electrolyte in a quartz tube, and the vacuum sealing tube pressure is 10 -4 Pa

[0037] (5) The quartz tube of (4) is sintered at a high temperature in a muffle furnace, and after cooling, an arginite-type sulfide electrolyte is obtained.

[0038] Thus, the present invention prepares a kind o...

Embodiment 1

[0052] The preparation steps of a modified argentite-type sulfide electrolyte are as follows:

[0053] (1) Put Li in an argon-filled glove box 2 S. Mo 2 S 3 , LiCl, P 2 S 5 According to the molar ratio of 2.575: 0.0375: 1: 0.4625 for pre-mixing, avoid contact with air.

[0054] (2) Fix the sealed ball mill jar on the planetary ball mill for ball milling, the rotational speed is 550rpm, and the time is 16h.

[0055] (3) Press the preliminary solid electrolyte powder obtained in step (2) into tablets in a glove box with a pressure of 350 MPa and a thickness of 500 μm.

[0056] (4) Put the initial solid electrolyte sheet obtained in step (3) in a quartz tube or a glass tube, and seal it in a vacuum with a vacuum pressure of 1×10 -4 Pa.

[0057] (5) Place the sealed quartz tube or glass tube in step (4) in a muffle furnace for sintering, the time is 10h, the temperature is 600°C, and the temperature rise and fall rates are both 0.5°C / min -1 .

[0058] (6) get the composit...

Embodiment 2

[0061] The preparation steps of a modified argentite-type sulfide electrolyte are as follows:

[0062] (1) Put Li in an argon-filled glove box 2 S. Mo 2 S 3 , LiCl, P 2 S 5 The pre-mixing was carried out at a molar ratio of 2.55:0.025:1:0.475 to avoid contact with air.

[0063] (2) Fix the sealed ball mill jar on the planetary ball mill for ball milling, the rotational speed is 550rpm, and the time is 16h.

[0064] (3) Pressing the preliminary solid electrolyte powder obtained in step (2) into a glove box with a pressure of 350 Mpa and a thickness of 500 μm.

[0065] (4) Put the initial solid electrolyte sheet obtained in step (3) in a quartz tube or a glass tube, and seal it in a vacuum with a vacuum pressure of 1×10 -4 Pa.

[0066] (5) Place the sealed quartz tube or glass tube in step (4) in a muffle furnace for sintering, the time is 12h, the temperature is 550°C, and the temperature rise and fall rates are both 0.5°C / min -1 .

[0067] (6) get the composition as L...

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Abstract

The invention relates to a molybdenum-doped argyrodite type sulfide electrolyte and a preparation method thereof. The invention relates to argyrodite sulfide solid electrolyte and a preparation method thereof, and belongs to the technical field of battery materials. The chemical general formula of the sulfide electrolyte in the product researched and developed by the invention is Li < 6 + 2x > Mo < x > P < 1-x > S5Cl, xlt; and 0.5. The preparation method comprises the following steps: in a glove box filled with inert gas, weighing the raw materials according to the mass ratio, manually grinding and mixing, filling the mixture into a ball milling tank, sealing the ball milling tank, and putting the ball milling tank into a ball mill for high-energy ball milling; then taking out a sample after ball milling, and sealing the sample in a quartz glass tube in vacuum; and finally, sintering in a muffle furnace to obtain the target sulfide solid electrolyte.

Description

technical field [0001] The invention belongs to the technical field of battery materials, and in particular relates to a molybdenum-doped silver-germanite type sulfide electrolyte and a preparation method thereof. Background technique [0002] In modern society, people's demand for energy is increasing, and the limited reserves of traditional fossil energy and the huge pollution to the environment make people pay more attention to new clean and renewable energy (wind energy, solar energy, water energy, etc.). But the storage of renewable energy requires large-scale energy storage facilities. Among them, lithium-ion battery is a kind of energy storage device with very mature technology, which has been widely used in various fields of social life. However, traditional lithium-ion batteries are prone to the risk of combustion and explosion, which poses a great safety hazard. All-solid-state lithium batteries use solid electrolytes instead of liquid organic electrolytes, which...

Claims

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Application Information

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IPC IPC(8): H01M10/0562H01M10/058
CPCH01M10/0562H01M10/058H01M2300/0068Y02E60/10
Inventor 张希朱金辉陈振营
Owner SHANGHAI FIRM-LITHIUM NEW ENERGY TECH CO LTD
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