METHOD FOR MANUFACTURING NEGATIVE ELECTRODE PLATE, NEGATIVE ELECTRODE PLATE, AND RECHARGEABLE BATTERY
A method for manufacturing a negative electrode plate of a rechargeable battery is provided. The method includes kneading a negative electrode active material and a negative electrode additive to form a negative electrode mixture paste; applying the negative electrode mixture paste to a negative electrode current collector; and drying the negative electrode mixture paste. The blackness of a material prepared by kneading the negative electrode active material and the negative electrode additive is set in a range of 4 to 16. The viscosity of a negative electrode thickener contained in the negative electrode additive is set in a range of 13000 mPa·s to 21000 mPa·s when a shear rate is 0.01 s −1 .
1 . A method for manufacturing a negative electrode plate of a rechargeable battery, the method comprising:
kneading a negative electrode active material and a negative electrode additive to form a negative electrode mixture paste;
applying the negative electrode mixture paste to a negative electrode current collector; and
drying the negative electrode mixture paste, wherein
a blackness of a material prepared by kneading the negative electrode active material and the negative electrode additive is set in a range of 4 to 16, and
a viscosity of a negative electrode thickener contained in the negative electrode additive is set in a range of 13000 mPa·s to 21000 mPa·s when a shear rate is 0.01 s −1 .
2 . The method according to claim 1 , wherein
the negative electrode additive includes at least the negative electrode thickener and a negative electrode solvent, and
the blackness of the material is a blackness of a primary kneaded material prepared by kneading the negative electrode active material, the negative electrode thickener, and the negative electrode solvent.
3 . The method according to claim 2 , wherein a solid content of the primary kneaded material is set to be in a range of 58% to 61%.
4 . A negative electrode plate, comprising:
a negative electrode current collector forming a substrate of a negative electrode of a rechargeable battery; and
a negative electrode mixture layer formed by applying a negative electrode mixture paste to the negative electrode current collector and drying the negative electrode mixture paste, the negative electrode mixture paste being prepared by kneading a negative electrode active material and a negative electrode additive, wherein
a kneaded material of the negative electrode active material and the negative electrode additive has a blackness in a range of 4 to 16, and
the negative electrode additive contains a negative electrode thickener having a viscosity in a range of 13000 mPa·s to 21000 mPa·s when a shear rate is 0.01 s −1 .
5 . A rechargeable battery, comprising:
a negative electrode plate of a negative electrode;
a positive electrode plate of a positive electrode; and
a separator arranged between the negative electrode plate and the positive electrode plate, wherein
the negative electrode plate includes a negative electrode current collector that forms a substrate of the negative electrode and a negative electrode mixture layer formed by applying a negative electrode mixture paste to the negative electrode current collector and drying the negative electrode mixture paste, the negative electrode mixture paste being prepared by kneading a negative electrode active material and a negative electrode additive,
a kneaded material of the negative electrode active material and the negative electrode additive has a blackness in a range of 4 to 16, and
the negative electrode additive contains a negative electrode thickener having a viscosity in a range of 13000 mPa·s to 21000 mPa·s when a shear rate is 0.01 s −1 .