Stable metal lithium powder and preparation method and application thereof

A metal lithium powder and stable technology, applied in metal processing equipment, transportation and packaging, electrical components, etc., can solve the problems of the preparation method of stable metal lithium powder, such as complicated operation, unsuitable for large-scale promotion and use, and low battery first efficiency. , to achieve the effect of being convenient for large-scale promotion and use, convenient for safe transportation, high stability and storage life

Inactive Publication Date: 2021-06-25
KUNSHAN BAOTRON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of the stable metal lithium powder is complicated to operate, difficult to control, and not suitable for large-scale popularization and use
[0008] In summary, there is an urgent need to develop a new type of stable lithium metal powder and its preparation method, which not only simplifies the preparation process, but also makes the prepared stable lithium metal powder have high stability and storage life, which is convenient and safe. Transportation, storage and use, and can be widely used as a pre-supplemented lithium additive for lithium battery electrode materials to solve the problem of low first efficiency of lithium batteries, thereby improving the comprehensive performance of lithium batteries such as capacity and cycle life

Method used

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  • Stable metal lithium powder and preparation method and application thereof
  • Stable metal lithium powder and preparation method and application thereof
  • Stable metal lithium powder and preparation method and application thereof

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preparation example Construction

[0050] Such as figure 1 Shown, the preparation method of stable lithium metal powder of the present invention comprises the steps:

[0051] (1) Mix the lithium metal powder and the coating liquid evenly and heat and stir, the coating liquid includes mercaptosilane compounds and alkoxysilane compounds;

[0052] (2) The product obtained in the step (1) is filtered, washed and dried in sequence to obtain a stable metal lithium powder coated with a composite silicate.

Embodiment 1

[0054] The present embodiment provides a kind of preparation method of stable metal lithium powder, and described preparation method comprises the following steps:

[0055] (1) Under an argon atmosphere, add 1g of 3-mercaptopropyltrimethoxysilane and 1g of tetraethoxysilane into a glass three-necked flask, and control the mercaptosilane compound and the alkoxysilane compound The mass ratio is 1:1, and then 100mL hexadecene solvent is added to the bottle to obtain a uniform coating solution, and then in an ultra-low dew point room with a dew point ≤ -70°C, 0.5g of the particle size is 20μm and the surface contains Li 2 The metal lithium powder of O and / or LiOH is uniformly mixed with the coating liquid and heated and stirred, the temperature of the heating and stirred is controlled to be 25° C., the stirring speed is 1000 rpm, and the time is 120 min;

[0056] (2) In a glove box under an argon atmosphere, the product obtained in step (1) is first suction filtered using a Buchn...

Embodiment 2

[0058] The present embodiment provides a kind of preparation method of stable metal lithium powder, and described preparation method comprises the following steps:

[0059] (1) Under an argon atmosphere, add 1g of 3-mercaptopropyltrimethoxysilane and 3g of tetraethoxysilane into a glass three-necked flask, and control the mercaptosilane compound and the alkoxysilane compound The mass ratio is 1:3, and then 100mL of hexadecene solvent is added to the bottle to obtain a uniform coating solution, and then in an ultra-low dew point room with a dew point ≤ -70°C, 0.5g of particles with a particle size of 20μm and a surface containing Li 2 The metal lithium powder of O and / or LiOH is uniformly mixed with the coating liquid and heated and stirred, the temperature of the heating and stirred is controlled to be 25° C., the stirring speed is 1000 rpm, and the time is 120 min;

[0060] (2) In a glove box under an argon atmosphere, the product obtained in step (1) is first suction filter...

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Abstract

The invention relates to stable metal lithium powder and a preparation method and application thereof. The preparation method comprises the steps of uniformly mixing metal lithium powder and a coating liquid containing a mercaptosilane compound and an alkoxy silane compound, performing heating and stirring, and sequentially filtering, washing and drying an obtained product to obtain the stable metal lithium powder coated with composite silicate. In the preparation method, the metal lithium powder is not needed to be pretreated, a chemical substitution reaction is directly performed on a slight oxidization constituent on a surface of the metal lithium powder and the coating liquid, and a compact and light composite silicate coating layer can be formed on the surface of the metal lithium powder; and the preparation method is simple in process and high in operability, the prepared stable metal lithium powder has high stability and long storage lifetime, is convenient to transport, store and use and can be widely used as a lithium pre-supplement additive of a lithium battery electrode material, so that the comprehensive performance such as the capacity and the cycle lifetime of a lithium battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a stable metal lithium powder and a preparation method and application thereof. Background technique [0002] Lithium-ion batteries are widely used due to their advantages such as high working voltage, large specific energy, small size, light weight, long cycle life, low self-discharge, no memory effect, and no pollution. In recent years, with the rapid development of new energy vehicles, smart grids, and distributed energy storage, higher requirements have been placed on the energy density of lithium-ion batteries. The negative electrode materials of traditional lithium-ion batteries are graphite and carbon materials, and the positive electrode materials include lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate and other materials. At present, most commercial lithium-ion batteries use carbonaceous negative electrodes, generally graphite-based m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F1/00H01M4/139H01M4/1395H01M4/38H01M4/62H01M10/0525H01M10/42
CPCH01M4/62H01M4/382H01M4/139H01M4/1395H01M10/4235H01M10/0525B22F1/102B22F1/145Y02E60/10
Inventor 赵育松邱昭政李文龙梁世硕
Owner KUNSHAN BAOTRON NEW ENERGY TECH CO LTD
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