High rate lithium battery negative plate and lithium battery
A lithium battery, high rate technology, applied in battery electrodes, lithium storage batteries, electrode carriers/current collectors, etc., can solve problems such as large internal resistance and poor rate performance
Active Publication Date: 2021-05-18
广西华政新能源科技有限公司
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- Application Information
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Problems solved by technology
However, the current lithium batteries still have the disadvantages of large internal resistance and poor rate performance.
Method used
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Embodiment 1
[0028] A negative electrode sheet for a high-rate lithium battery, comprising: a porous copper foil; a negative electrode slurry layer disposed on the surface of the porous copper foil, and the negative electrode slurry layer includes a first negative electrode slurry layer and a second negative electrode slurry layer;
[0029] Wherein, the coating method of the negative electrode slurry layer comprises:
[0030] Step 1, spray ammonium persulfate solution around the holes of the porous copper foil, the average hole diameter of the holes is 600 μm;
[0031] Step 2, dispersing aniline and carbon nanotubes in water, ultrasonicating for 50 minutes to form an aniline-carbon nanotube dispersion, soaking the porous copper foil sprayed with ammonium persulfate solution in step 1 with the aniline-carbon nanotube dispersion;
[0032] Step 3, washing the porous copper foil soaked in the aniline-carbon nanotube dispersion with ethanol and water in sequence, and then drying;
[0033] Step...
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Abstract
The invention discloses a high-rate lithium battery negative electrode sheet, comprising: porous copper foil; a negative electrode slurry layer, which is arranged on the surface of the porous copper foil; wherein, the coating method of the negative electrode slurry layer includes: spraying around the holes of the porous copper foil ammonium persulfate solution; soak the porous copper foil with the aniline-carbon nanotube dispersion; wash the porous copper foil soaked with the aniline-carbon nanotube dispersion successively with ethanol and water; prepare the first negative electrode slurry and the second negative electrode slurry; the positive and negative sides of the porous copper foil are coated with the first negative electrode slurry, dried, and compacted to obtain the first negative electrode slurry layer; the surface of the first negative electrode slurry layer is evenly punched out to form an array of pits. The surface of the first negative electrode slurry layer is coated with the second negative electrode slurry, dried and compacted to obtain the second negative electrode slurry layer. The invention also provides a lithium battery. By improving the composition and structure of the negative electrode slurry layer, the conductivity is improved, the internal resistance is reduced, and the rate performance of the lithium battery is improved.
Description
technical field [0001] The invention relates to the technical field of lithium batteries. More specifically, the present invention relates to a high-rate lithium battery negative plate and a lithium battery. Background technique [0002] Lithium batteries have the advantages of high energy density, long life, and small self-discharge, and have become the main energy source for digital products. However, the current lithium batteries still have the disadvantages of large internal resistance and poor rate performance. Therefore, there is an urgent need to further improve lithium batteries and their components. Contents of the invention [0003] An object of the present invention is to provide a high-rate lithium battery negative electrode sheet and lithium battery. By improving the composition and structure of the negative electrode slurry layer, the conductivity is improved, the internal resistance is reduced, and the rate performance of the lithium battery is improved. ...
Claims
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IPC IPC(8): H01M4/36H01M4/583H01M4/60H01M4/66H01M4/04
CPCH01M4/0402H01M4/366H01M4/583H01M4/606H01M4/667H01M10/052Y02E60/10
Inventor 何敏华陆何萍
Owner 广西华政新能源科技有限公司