A double-type anti-perovskite lithium-ion solid electrolyte and its preparation method and application

A technology of solid electrolyte and anti-perovskite, which is applied in the field of lithium-ion batteries, can solve the problem that the ion conductivity needs to be improved, and achieve the effect of improving the ion conductivity

Active Publication Date: 2020-06-05
ZHENGZHOU NEW CENTURY MATERIALS GENOME INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ionic conductivity of current perovskite or antiperovskite solid electrolytes still needs to be improved.

Method used

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  • A double-type anti-perovskite lithium-ion solid electrolyte and its preparation method and application
  • A double-type anti-perovskite lithium-ion solid electrolyte and its preparation method and application
  • A double-type anti-perovskite lithium-ion solid electrolyte and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The lithium-ion solid electrolyte of the present embodiment has a chemical composition of Li 3 o 0.5 S 0.5 I, structured as figure 2 shown.

[0054] The preparation method of the lithium ion solid electrolyte of the present embodiment comprises the following steps:

[0055] 1) Lithium oxide (Li 2 O), lithium sulfide (Li 2 S) and lithium iodide (LiI) powder were dried in a vacuum oven for 24h, and then in a glove box, under the protection of an argon atmosphere, lithium oxide (LiI) was 2 O), lithium sulfide (Li 2 S) and lithium iodide (LiI) were uniformly mixed, put into a ball mill jar, and 15 zirconia ball mill balls with a diameter of 10mm were added, and the ball mill jar was sealed. Take the sealed ball mill tank out of the glove box, put it into the omnidirectional planetary ball mill for ball milling, set the speed of the ball mill to 350rpm, and keep the ball mill for 20 minutes for each ball mill, and let it stand for cooling for 5 minutes; the total tim...

Embodiment 2

[0060] The lithium-ion solid electrolyte of the present embodiment has a chemical composition of Li 3 o 0.5 S 0.5 I.

[0061] The preparation method of the lithium ion solid electrolyte of the present embodiment comprises the following steps:

[0062] 1) Lithium oxide (Li 2 O), lithium sulfide (Li 2S) and lithium iodide (LiI) powder were dried in a vacuum oven for 24h, and then in a glove box, under the protection of an argon atmosphere, lithium oxide (LiI) was 2 O), lithium sulfide (Li 2 S) and lithium iodide (LiI) were uniformly mixed, put into a ball mill jar, and 15 zirconia ball mill balls with a diameter of 10mm were added, and the ball mill jar was sealed. Take the sealed ball mill tank out of the glove box, put it into the omnidirectional planetary ball mill for ball milling, set the speed of the ball mill to 350rpm, and keep the ball mill for 20 minutes for each ball mill, and let it stand for cooling for 5 minutes; the total time of ball milling is 10h, and the...

Embodiment 3

[0066] The lithium-ion solid electrolyte of the present embodiment has a chemical composition of Li 3 o 0.5 S 0.75 I 0.5 .

[0067] The preparation method of the lithium ion solid electrolyte of the present embodiment comprises the following steps:

[0068] 1) Lithium oxide (Li 2 O), lithium sulfide (Li 2 S), lithium iodide (LiI) powder is dried in vacuum oven for 24h, then in glove box, under the protection of argon atmosphere, lithium oxide, lithium sulfide, lithium iodide are evenly mixed, and packed into a ball mill jar, And add several zirconia ball milling balls with a diameter of 10mm, and seal the ball milling jar. Take the sealed ball mill tank out of the glove box, put it into the omnidirectional planetary ball mill for ball milling, set the speed of the ball mill to 350rpm, and keep the ball mill for 20 minutes for each ball mill, and let it stand for cooling for 5 minutes; the total time of ball milling is 10h, and the precursor body;

[0069] 2) Under the ...

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Abstract

The invention relates to double-type antiperovskite lithium-ion solid electrolyte as well as a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The lithium-ion solid electrolyte disclosed by the invention has the chemical formula shown as follows: Li[3+a]MpAmBn(XxYy)[1-b], wherein a is greater than or equal to -0.25 and less than or equal to 0.25; b is greater than or equal to 0 and less than or equal to 0.5; p is greater than or equal to 0 and less than or equal to 0.5; m is greater than 0 and less than or equal to 1.25; n is greater than 0 and less than or equal to 1.25; x is greater than or equal to 0 and less than or equal to 1; y is greater than or equal to 0 and less than or equal to 1; M is any one of Ca, Ba, Mg, Al and Ti; A and B is any two of O, S, Se, Te, N, P, Si, C, Sb, Bi, F, Cl, Br and I; X and Y are separately selected from one of halogen or a negative univalent ionic group or vacancy. The structure of the lithium-ion solid electrolyte disclosed by the invention is a double-type antiperovskite structure, is stable in structure and has a good lithium-ion transmission property.

Description

technical field [0001] The invention relates to a double-type inverse perovskite lithium-ion solid electrolyte and a preparation method and application thereof, belonging to the technical field of lithium-ion batteries. Background technique [0002] Lithium-ion batteries are generally composed of a positive electrode, a negative electrode, a diaphragm between the device and the positive and negative electrodes, and an electrolyte. Since the electrolyte used in lithium-ion batteries uses organic solvents, and the organic solvents are very easy to burn, in order to improve the safety of lithium-ion batteries In order to prevent leakage of the electrolyte or to prevent the combustion of the electrolyte, it usually requires special design on the battery structure or battery materials. The electrolyte used in lithium-ion batteries is also very easy to form lithium dendrites on the surface of the negative electrode, causing a short circuit inside the battery and releasing a large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0564H01M10/0562H01M10/0525
CPCH01M10/0525H01M10/0562H01M10/0564H01M2300/0065H01M2300/0068H01M2300/0071Y02E60/10
Inventor 邵国胜王卓徐红杰轩敏杰
Owner ZHENGZHOU NEW CENTURY MATERIALS GENOME INST CO LTD
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