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Solid electrolyte material, preparation method thereof, solid electrolyte sheet and all-solid-state battery

A technology of solid electrolytes and raw materials, applied in solid electrolytes, non-aqueous electrolytes, secondary batteries, etc., can solve the problem of few types of inorganic lithium ion conductors, and achieve good ion conductivity and cycle performance

Active Publication Date: 2021-08-24
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are fewer types of inorganic lithium ion conductors in the prior art

Method used

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  • Solid electrolyte material, preparation method thereof, solid electrolyte sheet and all-solid-state battery
  • Solid electrolyte material, preparation method thereof, solid electrolyte sheet and all-solid-state battery
  • Solid electrolyte material, preparation method thereof, solid electrolyte sheet and all-solid-state battery

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preparation example Construction

[0051] The preparation method of the above-mentioned solid electrolyte material comprises: the raw material M 2 N, MA and MB are mixed and pre-pressed to obtain a green body, wherein M is selected from one of the alkali metals, N is selected from one of the non-metals of the sixth main group, and both A and B are selected from halogens A, and A and B are different; M 2 The molar ratio of N, MA and MB is 1:(2-x):x, 0≤x≤2. The green body is sintered at a temperature not lower than 300°C and a pressure not lower than 1GPa for 30 minutes or more.

[0052] Wherein, prior to pressing, the raw materials are mixed. Optionally, various raw materials are ground first, and then vacuum ball milled. Further, put various raw materials into an agate mortar for thorough mixing and grinding for about 10 minutes, and then put the pre-ground samples into a vacuum ball mill jar (this process is carried out in a glove box) for full ball milling at a speed of 400 -800r / min, grinding time is 4-1...

Embodiment 1

[0077] Weigh the Li with a molar ratio of 1:2 2 O and LiBr were put into an agate mortar for thorough mixing and grinding for about 10 minutes, and then the pre-ground samples were put into a vacuum ball mill jar (this process was carried out in a glove box) for full ball milling at a speed of 600r / min, the grinding time is 6h; the ball-milled powder is pre-pressed into a cylindrical shape, the pressure is 80MPa, and the pressure is held for 3 minutes to form (in the glove box), the raw material can be pre-pressed into a complete cylindrical shape; the pre-pressed cylindrical shape The blank is placed in the high-pressure synthesis block as a reactant; the assembled high-pressure synthesis block is placed in the synthesis chamber of the six-sided top press for reaction. The synthesis temperature is 820°C, the pressure is about 5GPa, and the synthesis reaction time is about 50 minutes; After the reaction is completed, the temperature is lowered and the pressure is released, an...

Embodiment 2

[0079] Weigh the Li with a molar ratio of 1:0.5:1.5 2 O, LiCl and LiBr were put into an agate mortar and thoroughly mixed and ground for about 10 minutes, and then the pre-ground samples were put into a vacuum ball mill jar (this process was carried out in a glove box) for full ball milling at a speed of 600r / min, the grinding time is 6h; the ball-milled powder is pre-pressed into a cylindrical shape, the pressure is 80MPa, and the pressure is kept for 3 minutes to form (in the glove box), the raw material can be pre-pressed into a complete cylindrical shape; the pre-pressed The cylindrical blank is placed in the high-pressure synthesis block as a reactant; the assembled high-pressure synthesis block is placed in the synthesis chamber of the six-sided top press for reaction. The synthesis temperature is 830°C, the pressure is about 5GPa, and the synthesis reaction time is about 50min; after the reaction is completed, the temperature is lowered and the pressure is released, and...

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Abstract

The invention provides a solid electrolyte material, a preparation method thereof, a solid electrolyte sheet and an all-solid-state battery, and belongs to the technical field of solid electrolyte materials. The chemical formula of the solid electrolyte material is M4NA2-xBx (x is greater than or equal to 0 and less than or equal to 2), the solid electrolyte material is a tetragonal system, the space group is P4 / mmm, M is selected from one of alkali metals, N is selected from one of nonmetals of the sixth main group, A and B are selected from one of halogens, and A and B are different. The solid electrolyte material is a novel material of a tetragonal crystal system, and after the solid electrolyte material is used for preparing a solid electrolyte sheet and used for assembling an all-solid-state battery, the electrical property of the all-solid-state battery can be met.

Description

technical field [0001] The present application relates to the technical field of solid-state electrolyte materials, and in particular to a solid-state electrolyte material, a preparation method thereof, a solid-state electrolyte sheet and an all-solid-state battery. Background technique [0002] Lithium-ion batteries are widely used in fields such as electric vehicles and portable electronic devices. Currently, most commercial lithium-ion batteries use organic liquid electrolytes, which have many disadvantages, such as toxicity, corrosion, and flammability, which may pose environmental and safety concerns. Replacing organic liquid electrolytes with solid electrolytes is widely considered to be the key to solving this problem. On the other hand, the use of solid electrolytes is also compatible with pure lithium anodes. Therefore, inorganic solid-state electrolytes have received extensive attention, which are expected to eliminate the safety and environmental issues of organ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525
CPCH01M10/0562H01M10/0525H01M2300/0068Y02E60/10Y02P70/50
Inventor 王李平解植擎赵予生王培
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA