A preparation method based on copper oxide composite lithium battery negative electrode material

A battery negative electrode and lithium composite technology, which is applied in the direction of 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 achieve low preparation costs, simple preparation process, The effect of stable performance

Active Publication Date: 2021-02-26
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 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, adding the weighed copper oxide powder and graphite powder into a closed mixer for stirring, the stirring time is 3 to 4.5 hours, and the stirring temperature is 40 to 50°C;

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

[0035] S4. Put the mixture in S3 into a closed drying oven for drying treatment, raise the temperature to 120°C-150°C, and keep the temperature for 1.5-3h;

[0036] S5. Adding a carbonization modifier to the mixture of S4 and heating and carbonizing in an inert gas atmosphere. The temperature of heating and carbonization is 850° C. to 1150° C., and the heating a...

Embodiment 2

[0045] A preparation method based on 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, adding 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, adding the mixture of S2 into a closed ball mill, and adding deionized water into the ball mill, ball milling for 10 hours, the ball milling speed is 750r / min, and the ball milling temperature is 50°C;

[0049] S4. Put the mixture in S3 into a closed drying oven for drying treatment, raise the temperature to 120°C, and keep the temperature for 1.5h;

[0050] S5, adding a carbonization modifier 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 5 hours;

[0051] S6. ...

Embodiment 3

[0059] A preparation method based on 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, adding 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, adding the mixture of S2 into a closed ball mill, and adding deionized water into the ball mill, ball milling for 12 hours, the ball milling speed is 950r / min, and the ball milling temperature is 65°C;

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

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

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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 lithium battery negative electrode materials, in particular to a method for preparing a copper oxide-based composite lithium battery negative electrode material. Background technique [0002] With the country's support and emphasis on new energy technology, lithium-ion batteries have received great attention in life. Since lithium-ion batteries began to appear in the 1990s, they have been widely used. It has many other batteries that cannot surpass advantages, 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 20th century, miniaturized equipment is increasing day by day, which puts forward...

Claims

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Application Information

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Patent Type & Authority Patents(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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