Positive electrode plate and preparation method therefor, battery, and electrical apparatus
AssigneeContemporary Amperex Technology Co., Limited
InventorsQifan Yang, Chengyong Liu, Bingkun Guo
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Abstract
The present application discloses a positive electrode plate and a preparation method therefor, a positive electrode plate, a battery and an electrical apparatus. The positive electrode plate comprises a positive electrode current collector, and at least one side of the positive electrode plate away from the positive electrode current collector comprises a polymer and an organic solvent, wherein the organic solvent is located in the polymer, and the electrochemical oxidation window of the organic solvent is greater than 4 V.
Claims20
A battery, comprising a positive electrode plate, wherein the positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer arranged on at least one side of the positive electrode current collector, the positive electrode active material layer comprises positive electrode active particles, a surface of the positive electrode active particles has a polymer layer, the polymer layer comprises a polymer and an organic solvent, the organic solvent is located in the polymer, and an electrochemical oxidation window of the organic solvent is higher than 4 V,
- wherein a thickness of the positive electrode active material layer is 30-60 μm,
- a thickness of the polymer layer is 0.01-2 μm;
- a mass ratio of the polymer to the organic solvent is (0.1-99):(1-99.9).
A battery, comprising a positive electrode plate, wherein the positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer arranged on at least one side of the positive electrode current collector, the positive electrode active material layer comprises positive electrode active particles, a surface of the positive electrode active particles has a polymer layer, the polymer layer comprises a polymer and an organic solvent, the organic solvent is located in the polymer, and an electrochemical oxidation window of the organic solvent is higher than 4 V,
- wherein the polymer layer further comprises at least one of a film-forming additive and an adsorption additive, an electrochemical oxidation window of the film-forming additive is less than or equal to 4 V, an electrochemical oxidation window of the adsorption additive is higher than 4 V, a mass ratio of the polymer to the film-forming additive to the adsorption additive is (10-100):(0-90):(0-90).
Dependencies are inferred from the claim text.