Preparation method of composite lithium battery negative electrode material based on copper oxide

A technology of battery negative electrode and composite lithium, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of poor performance of negative electrode materials, complicated preparation methods, poor battery performance, etc., and achieves low preparation cost, simple preparation process, Stable performance

Active Publication Date: 2019-10-08
徐州硕祥信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the preparation method of the existing lithium battery negative electrode material is relatively complicated, the preparation cost is high, and the performance of the negative electrode material is not good, resulting in poor battery performance and low energy density.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method based on a copper oxide composite lithium battery negative electrode material, comprising the following steps:

[0032] S1. Weigh the required raw materials according to the proportion;

[0033] S2. Add the weighed copper oxide powder and graphite powder into a closed mixer for stirring, the stirring time is 3-4.5h, and the stirring temperature is 40-50°C;

[0034] S3, adding the mixture of S2 into a closed ball mill, adding deionized water to the ball mill, and ball milling for 10 to 12 hours, with a ball milling speed of 750 to 950 r / min, and a ball milling temperature of 50 to 65°C;

[0035] S4, adding the mixture in S3 into a closed drying box for drying treatment, raising the temperature to 120°C to 150°C, and maintaining the temperature for 1.5 to 3 hours;

[0036] S5, adding a carbonization regulator to the mixture of S4 and heating and carbonizing in an inert gas atmosphere, the heating and carbonization temperature is 850 ℃ ~ 1150 ℃, and t...

Embodiment 2

[0045] A preparation method based on a copper oxide composite lithium battery negative electrode material, comprising the following steps:

[0046] S1. Weigh the required raw materials according to the proportion;

[0047] S2. Add the weighed copper oxide powder and graphite powder into a closed mixer for stirring, the stirring time is 3h, and the stirring temperature is 40°C;

[0048] S3. Add the mixture of S2 into a closed ball mill, add deionized water to the ball mill, and perform ball milling for 10 hours, with a ball milling speed of 750 r / min and a ball milling temperature of 50 °C;

[0049] S4, adding the mixture in S3 into a closed drying box for drying, raising the temperature to 120°C, and maintaining the temperature for 1.5h;

[0050] S5, adding a carbonization regulator to the mixture of S4 and heating and carbonizing in an inert gas atmosphere, the temperature of heating and carbonization is 850°C, and the heating and carbonization time is 5h;

[0051] S6, addi...

Embodiment 3

[0059] A preparation method based on a copper oxide composite lithium battery negative electrode material, comprising the following steps:

[0060] S1. Weigh the required raw materials according to the proportion;

[0061] S2. Add the weighed copper oxide powder and graphite powder into a closed mixer for stirring, the stirring time is 4.5h, and the stirring temperature is 50°C;

[0062] S3. Add the mixture of S2 into a closed ball mill, add deionized water to the ball mill, and perform ball milling for 12 hours, with a ball milling speed of 950 r / min and a ball milling temperature of 65°C;

[0063] S4, adding the mixture in S3 into a closed drying box for drying treatment, raising the temperature to 150°C, and maintaining the temperature for 3h;

[0064] S5, adding a carbonization regulator to the mixture of S4 and heating and carbonizing in an inert gas atmosphere, the heating and carbonization temperature is 1150 ° C, and the heating and carbonization time is 7h;

[0065]...

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PUM

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Abstract

The invention belongs to the field of preparation of a lithium battery negative electrode material, and in particular relates to a preparation method of a composite lithium battery negative electrodematerial based on copper oxide. For the problem that the performance of a prepared battery is unstable due to poor performance of the existing lithium battery negative electrode material, the following scheme is proposed. The method comprises the steps that stirring and ball milling are carried out on copper oxide powder and graphite powder, drying is carried out; the mixture is carbonized, and aweighed conductive agent and binder are added into the mixture for mixing; relevant raw materials are added into a thickener solution and mixed to acquire a mixture B; and a mixture A, the mixture B and weighed polyvinylidene fluoride are mixed and stirred to aquire a negative electrode gel-like mixture. The preparation method has the advantages of simple preparation process, low preparation cost,sufficient mixing and agglomeration of various components, full effect of each component and improved performance of the negative electrode material. The battery made of the negative electrode material has the advantages of stable performance, high energy density and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of negative electrode materials for lithium batteries, in particular to a preparation method of negative electrode materials for lithium batteries based on copper oxide composites. Background technique [0002] With the country's support and emphasis on new energy technology, lithium-ion batteries have received great attention in life. Since the emergence of lithium-ion batteries in the 1990s, they have been widely used. It has many other batteries that cannot be surpassed. The advantages of lithium metal, such as light weight, long life, high cycle performance, small size, etc., due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements, so lithium batteries have not been used for a long time. , With the development of microelectronics technology at the end of the twentieth century, the number of mini...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/62
CPCH01M4/364H01M4/485H01M4/62H01M4/625Y02E60/10
Inventor 于祥波
Owner 徐州硕祥信息科技有限公司
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