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Solid electrolyte material, and preparation method and application thereof

A solid electrolyte and raw material technology, applied in the direction of electrolyte immobilization/gelation, circuits, electrical components, etc., can solve the problems of unfavorable solid-state battery manufacturing, high cost of In and Sc elements, unfavorable industrial application, etc. Chemical Oxidation Potential and Effect of Air Stability

Pending Publication Date: 2022-01-18
RARE EARTH FUNCTIONAL MATERIALS XIONG AN INNOVATION CENT CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the materials reported so far, Li 3 InCl 6 and Li 3 ScCl 6 The cost of In and Sc elements used is expensive, which is very unfavorable for its future industrial application
Li 3 YCl 6 , Li 3 YBr 6 , Li 3 ErCl 6 On the one hand, the oxidation potential is still low; on the other hand, it is easy to absorb moisture and has poor air stability, which is not conducive to the manufacture of solid-state batteries.

Method used

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

Examples

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Embodiment 1

[0086] Accurately weigh 18.90 g of anhydrous YCl in an Ar-filled glove box 3 (wt99.9%), 12.72 grams of anhydrous LiCl (99.9wt%) and 0.48 grams of YF 3 , ground into powder, mixed evenly, and loaded into a quartz tube. Other operations are the same as in Comparative Example 1. The resulting product is Li 3 YCl 5.9 f 0.1 Material.

[0087]Embodiment 2-12 except that raw material ratio is different, all the other operations are all the same as embodiment 1, and each embodiment takes raw material according to the element ratio shown in chemical formula.

[0088] The detailed comparative situation of all embodiments is shown in Table 1.

[0089] Table 1:

[0090]

[0091]

[0092] As can be seen from Comparative Example 1 and Example 2 in Table 1, a small amount of F can replace Li 3 YCl 6 The oxidation potential was increased from 4.10V to 4.50V while maintaining 0.50mS cm -1 ionic conductivity. The hygroscopicity of the material is also significantly improved, an...

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Abstract

The invention relates to a solid electrolyte material, and a preparation method and application thereof. The chemical general formula of the material is LiaREXbFc, wherein RE is at least one of rare earth elements Y, Er and Yb, X is one or two of Cl and Br, 2.5 <= a <= 3.5, 3.5 <= b < 6.5, and 0 < c <= 2. The material improves the performance of the rare earth halide solid electrolyte material, and especially improves the electrochemical oxidation potential and air stability of the rare earth halide solid electrolyte material.

Description

technical field [0001] The invention relates to the field of solid-state batteries, in particular to a rare-earth halide solid-state electrolyte material and its preparation method and application. Background technique [0002] All-solid-state batteries based on solid-state electrolytes are currently an important development direction for power batteries. They are expected to achieve higher specific energy density than traditional lithium-ion batteries based on liquid electrolytes, and can completely solve the safety problems of traditional lithium-ion batteries. [0003] Solid-state electrolyte materials with excellent performance are the key to all-solid-state batteries. Generally, solid-state electrolytes are expected to have the following three properties: (1) excellent intrinsic electrochemical properties, including high room temperature ionic conductivity, and a suitable electrochemical window; (2) good physical and chemical stability, so that solid-state batteries (3...

Claims

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Application Information

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IPC IPC(8): H01M10/0562H01M10/0525H01M10/42
CPCH01M10/0525H01M10/0562H01M10/4235H01M2300/0085H01M10/42Y02E60/10
Inventor 余金秋徐国峰罗亮杨容赵尚骞余天玮段奕王建涛
Owner RARE EARTH FUNCTIONAL MATERIALS XIONG AN INNOVATION CENT CO LTD
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