Lithium ion solid electrolyte and preparation method and application thereof

A solid electrolyte, lithium-ion battery technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of unstable electrochemical properties, hinder the practical application of all-solid-state batteries, etc., and achieve good electrochemical compatibility and excellent thermodynamic stability. The effect of high conductivity and electrical conductivity

Active Publication Date: 2017-12-01
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 electrochemical properties of this material are unstable when in contact with metallic Li, which hinders its practical application in all-solid-state battery technology.

Method used

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  • Lithium ion solid electrolyte and preparation method and application thereof
  • Lithium ion solid electrolyte and preparation method and application thereof
  • Lithium ion solid electrolyte and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The lithium-ion solid electrolyte of the present embodiment has a chemical composition of Li 3 OCl, the structure is as image 3 (a) shown.

[0051] The preparation method of the lithium ion solid electrolyte of the present embodiment comprises the following steps:

[0052] 1) Lithium oxide (Li 2 O) and lithium chloride (LiCl) powders were dried in a vacuum oven for 24 hours, and then in a glove box, under the protection of an argon atmosphere, lithium oxide and lithium chloride were uniformly mixed, put into a ball mill jar, and several A zirconia ball milling ball with a diameter of 10mm is sealed in a ball milling jar. Take the sealed ball mill jar out of the glove box, put it into a full-range planetary ball mill for ball milling, set the speed of the ball mill to 280rpm, 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 3 hours, and the precursor body;

[0053] 2) Under the p...

Embodiment 2

[0056] The lithium-ion solid electrolyte of the present embodiment has a chemical composition of Li 3 o 1.25 Cl 0.5 .

[0057] The preparation method of the lithium ion solid electrolyte of the present embodiment comprises the following steps:

[0058] 1) Lithium oxide (Li 2 O) and lithium chloride (LiCl) powders were dried in a vacuum oven for 24 hours, and then in a glove box, under the protection of an argon atmosphere, lithium oxide and lithium chloride were uniformly mixed, put into a ball mill jar, and several A zirconia ball milling ball with a diameter of 10mm is sealed in a ball milling jar. Take the sealed ball mill tank out of the glove box, put it into a full-range planetary ball mill for ball milling, set the speed of the ball mill to 250rpm, 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 10 hours, and the precursor body;

[0059]2) Under the protection of argon atmosphe...

Embodiment 3

[0062] The lithium-ion solid electrolyte of the present embodiment has a chemical composition of Li 3.125 o 1.125 Cl 0.875 .

[0063] The preparation method of the lithium ion solid electrolyte of the present embodiment comprises the following steps:

[0064] 1) Lithium oxide (Li 2 O) and lithium chloride (LiCl) powders were dried in a vacuum oven for 24 hours, and then in a glove box, under the protection of an argon atmosphere, lithium oxide and lithium chloride were uniformly mixed, put into a ball mill jar, and several A zirconia ball milling ball with a diameter of 10mm is sealed in a 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;

[0065] 2) Under the protection of an a...

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Abstract

The invention relates to a lithium ion solid electrolyte and a preparation method application thereof, and belongs to the technical field of a lithium ion battery. The lithium ion solid electrolyte has the chemical formula shown as follows: Li<3+a>M

A<m>B<n>Y<1-b>, wherein a is more than or equal to -0.25 but less than or equal to 0.25, b is more than or equal to 0 but less than or equal to 0.5, m is more than or equal to 0 but less than or equal to 1.25, n is more than or equal to 0 but less than or equal to 1.25, M is one of Ca, Ba, Mg, Al and Ti, A and B are separately selected from one of O, S, Se, Te, N, P, Si, C, Sb, Bi, F, Cl, Br and I, and Y is one of halogen, minus monovalent ionic group or vacancy. The lithium ion solid electrolyte has a stable structure and favorable lithium ion transmission performance and has favorable electrochemical performance and safety performance when used as a solid electrolyte of the lithium ion battery.

Description

technical field [0001] The invention relates to a lithium-ion solid electrolyte, a preparation method and application thereof, and belongs 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 amount of heat in a short period...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M4/58
CPCH01M4/58H01M10/0562Y02E60/10
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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