METHOD FOR CARBON-COATING A LITHIUM-ION BATTERY ELECTRODE ACTIVE MATERIAL

摘要

Provided is a method for carbon-coating a lithium-ion battery electrode active material, comprising: electrode active material particles, a carbon source, and a first solvent are provided; the carbon source is a nonionic surfactant; the electrode active material particles, carbon source, and first solvent are mixed; the positive electrode active material is dispersed in the first solvent, and the carbon source is dissolved in the first solvent to obtain a first liquid mixture; the first liquid mixture is reacted under heating conditions of 130°C to 240°C and pressure conditions of 0.2 MPa to 30 MPa, causing the carbon source to coat the surface of the electrode active material particles and form a carbon source coating layer; the described electrode active material having a carbon source coating layer is separated from the first liquid mixture; and the electrode active material particles having a carbon source coating layer are sintered to obtain the carbon-coated lithium-ion battery electrode active material.