Lithium battery negative electrode slurry formula, lithium battery negative electrode, preparation method of lithium battery negative electrode and lithium battery
A negative electrode slurry, lithium battery technology, applied in battery electrodes, lithium batteries, non-aqueous electrolyte battery electrodes, etc., can solve the problem of reducing the compaction density of graphite negative electrodes, material processing performance, yield and production capacity constraints, and high process equipment requirements. problem, to achieve the effect of reducing the rebound of the pole piece, reducing the internal resistance, and improving the rate performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0030] This embodiment also discloses a method for preparing a negative electrode of a lithium battery, which is applied to the preparation of the negative electrode of a lithium battery as described above, and includes the steps:
[0031] S100: dry mixing hard carbon, graphite and high-pressure compaction aid to obtain a mixture;
[0032] S200: adding water to the mixture and mixing to obtain a pre-slurry, and the solid content is controlled at 50% to 70%;
[0033] S300: Knead the pre-slurry into a spherical shape, add sodium carboxymethyl cellulose for pre-dispersion, then add water to disperse, and add N-methylpyrrolidone;
[0034] S400: Add the binder, vacuum defoaming after stirring, and wait until the negative electrode slurry;
[0035] S500: coating the negative electrode slurry on the negative electrode current collector, and drying the negative electrode of the lithium battery.
[0036] Specifically, in step S100, the hard carbon and the high-pressure compaction aid...
experiment example
[0040] Production of negative electrode:
[0041] According to the lithium battery negative electrode slurry formula of the present invention, each component is mixed with water, stirred and dispersed to prepare negative electrode slurry, and then coated on smooth copper foil or carbon-coated copper foil by extrusion coater or transfer coater, The coating temperature is controlled between 80° C. and 150° C., and the negative electrode of the present invention can be obtained by drying and cold pressing. By changing the ratio of high compaction additive and hard carbon, the numbering relationship of the obtained negative electrode samples is shown in Table 1.
[0042] Negative number hard carbon High compaction additive compaction density Comparative Example A1 0wt.% 0wt.% 1.60g / cc Comparative Example A2 3wt.% 0wt.% 1.55g / cc Comparative Example A3 0wt.% 1wt.% 1.64g / cc Comparative Example A4 3wt.% 2wt.% 1.68g / cc Com...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Particle size | aaaaa | aaaaa |
| Particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More