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Preparation method for negative material of high-power lithium ion power battery, negative material and application

A negative electrode material, power battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as unfavorable industrialized production, complex reaction conditions, and many reaction raw materials, and achieve benefits for industrialized production, simple reaction conditions, and environmental protection. Effects with low ambience requirements

Inactive Publication Date: 2019-07-30
桑顿新能源科技(长沙)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Invention patent CN 106847543 A discloses a nano-Li 4 Ti 5 o 12 / Li 2 TiO 3 Composite electrode material and preparation method thereof, the composite material is composed of Li with a mass fraction of 5-25% 2 TiO 3 and 75-95% Li 4 Ti 5 o 12 composition, but there are many reaction raw materials in the preparation process, the preparation is cumbersome, and the reaction conditions are complicated, which is not conducive to industrialized production

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  • Preparation method for negative material of high-power lithium ion power battery, negative material and application
  • Preparation method for negative material of high-power lithium ion power battery, negative material and application
  • Preparation method for negative material of high-power lithium ion power battery, negative material and application

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Embodiment 1

[0028] A preparation method of a high-power lithium-ion power battery negative electrode material, comprising the following steps:

[0029] Step S1: Add 0.075gLiOH·H 2O. Pour 4.925g of tetrabutyl titanate and 40ml of ethanol into a 100ml beaker, place the beaker on a magnetic stirrer, add 50ml of deionized water, and stir for 4 hours to obtain a uniformly mixed white emulsion.

[0030] Step S2: Transfer the emulsion obtained in step S1 to a hydrothermal reaction kettle, place the reaction kettle in a blast drying oven at 150°C for 48 hours, and cool the emulsion in the thermal reaction kettle to room temperature naturally Washing with absolute ethanol to neutrality under the condition of suction filtration to obtain a lithium titanate negative electrode material precursor.

[0031] Step S3: Dry the lithium titanate negative electrode material precursor obtained in step S2 in a blast drying oven at 70°C, and then grind to obtain a composite phase Li 4 Ti 5 o 12 / Li 2 TiO ...

Embodiment 2

[0033] Step S1: Add 0.07gLiOH·H 2 O. Pour 4.92g of tetrabutyl titanate and 40ml of ethanol into a 100ml beaker, place the beaker on a magnetic stirrer, add 50ml of deionized water, and stir for 4 hours to obtain a uniformly mixed white emulsion.

[0034] Step S2: Transfer the emulsion obtained in step S1 to a hydrothermal reaction kettle, place the reaction kettle in a blast drying oven at 150°C for 40 hours, and cool the emulsion in the thermal reaction kettle to room temperature naturally Washing with absolute ethanol to neutrality under the condition of suction filtration to obtain a lithium titanate negative electrode material precursor.

[0035] Step S3: Dry the lithium titanate negative electrode material precursor obtained in step S2 in a blast drying oven at 70°C, and then grind to obtain a composite phase Li 4 Ti 5 o 12 / Li 2 TiO 3 anode material, where Li 2 TiO 3 in Li 4 Ti 5 o 12 / Li 2 TiO 3 The proportion of negative electrode material is 2%.

Embodiment 3

[0037] Step S1: Add 0.08gLiOH·H 2 O. Pour 4.93g of tetrabutyl titanate and 40ml of ethanol into a 100ml beaker, place the beaker on a magnetic stirrer, add 50ml of deionized water, and stir for 4 hours to obtain a uniformly mixed white emulsion.

[0038] Step S2: Transfer the emulsion obtained in step S1 to a hydrothermal reaction kettle, place the reaction kettle in a blast drying oven at 150°C for 48 hours, and cool the emulsion in the thermal reaction kettle to room temperature naturally Washing with absolute ethanol to neutrality under the condition of suction filtration to obtain a lithium titanate negative electrode material precursor.

[0039] Step S3: Dry the lithium titanate negative electrode material precursor obtained in step S2 in a blast drying oven at 70°C, and then grind to obtain a composite phase Li 4 Ti 5 o 12 / Li 2 TiO 3 anode material, where Li 2 TiO 3 in Li 4 Ti 5 o 12 / Li 2 TiO 3 The proportion of negative electrode material is 10%.

[0040]...

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Abstract

The invention discloses a preparation method for a negative material of a high-power lithium ion power battery, the negative material and an application. The preparation method comprises the steps ofmixing a compound of 1.4-1.6% of LiOH.H2O and 98.6-98.4% of titanium in a solvent; and carrying out hydrothermal reaction, suction filtration, drying and grinding to obtain the composite phase Li4Ti5O12 / Li2TiO3 negative material. Compared with lithium titanate (Li4Ti5O12), the negative material can obviously improve the charging power and the reversible capacity of the lithium ion battery, and hasrelatively good safety performance. The method is simple in preparation process and low in requirements on environment atmosphere, can be applied to the negative material of the high-power lithium ion power battery, and is easy for industrial production.

Description

technical field [0001] The invention belongs to the field of high-power power battery negative electrode materials, and in particular relates to a preparation method of high-power lithium-ion power battery negative electrode materials, negative electrode materials and applications. Background technique [0002] With the vigorous development of my country's new energy industry, lithium-ion batteries have become the first choice for battery systems for electric vehicles and large energy storage devices due to their high energy density and long cycle life. In recent years, with the continuous development of the lithium battery application market, the client's requirements for the performance of lithium-ion batteries are also increasing, especially in terms of safety performance and power performance of power batteries, so battery materials have become the key to restricting the above performance . [0003] At present, the most commonly used anode material is mainly graphite. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M10/0525
CPCH01M4/362H01M4/485H01M10/0525Y02E60/10
Inventor 李军飞李东剑秦蒙
Owner 桑顿新能源科技(长沙)有限公司
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