Manufacturing method of negative electrode materials and products thereof

Abstract

A method for manufacturing a negative electrode materials is provided. The method includes: mixing a silicon-based compound and an adhesive solution to form a first mixture, wherein the adhesive solution includes a first adhesive, and the first adhesive is an alkene polymer; mixing a second adhesive and the first mixture to form a second mixture, wherein the first adhesive is different from the second adhesive; mixing a conductive material and the second mixture to form a third mixture; and mixing a third adhesive and the third mixture to form the negative electrode material, wherein the third adhesive is different from the first adhesive and the second adhesive.

Claims

1. A method for manufacturing a negative electrode material, comprising: A silicon-based compound is added to an adhesive solution and mixed to form a first mixture, wherein the adhesive solution contains a first adhesive, the first adhesive being an acrylic polymer, and the first mixture includes a first adhesive body formed by the silicon-based compound and the first adhesive body; a second adhesive is added to the first mixture and mixed to form a second mixture, wherein the second adhesive is different from the first adhesive, and the second mixture includes a second adhesive body formed by coating the first adhesive body with the second adhesive; a conductive material is added to the second mixture and mixed to form a third mixture; and a third adhesive is added to the third mixture and mixed to form the negative electrode material, wherein the third adhesive is different from both the first and second adhesives.

2. The manufacturing method as described in claim 1, wherein: The first adhesive is a poly(acrylic acid) (PAA) adhesive, the second adhesive is a carboxymethyl cellulose (CMC) adhesive, and the third adhesive is a styrene-butadiene rubber (SBR) adhesive.

3. The manufacturing method as described in claim 1, wherein: The third mixture includes a third adhesive formed by coating the second adhesive with the conductive material.

4. The manufacturing method as described in claim 3, wherein: When the third adhesive is added to the third mixture and mixed, a negative electrode slurry is formed, wherein: the negative electrode slurry contains the negative electrode material; and the negative electrode material is generated by the third adhesive and the third adhesive.

5. The manufacturing method as described in claim 4, wherein: The negative electrode slurry is coated onto an electrode sheet to form a negative electrode sheet, and a drying process is performed to remove moisture from the negative electrode sheet.

6. The manufacturing method as described in claim 5, wherein: The drying process may include two stages of temperature control.

7. A negative electrode material, wherein the negative electrode material is prepared by a method for manufacturing a negative electrode material as described in any one of claims 1-6.

8. A negative electrode for a lithium-ion battery, wherein the negative electrode uses the negative electrode material as described in claim 7.

9. A lithium-ion battery comprising a negative electrode, wherein the negative electrode uses the negative electrode material as described in claim 7.

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