Pre-lithiated electrode plate based on carbon-coated silica material as well as preparation method and application of pre-lithiated electrode plate

The invention provides a pre-lithiation electrode plate based on a carbon-coated silica material and a preparation method and application thereof, belongs to the technical field of lithium ion batteries, and aims to solve the technical problems that a silicon-based material negative electrode of a lithium ion battery is non-uniform in pre-lithiation and the structure morphology is easy to damage. The preparation method comprises the following steps: mixing a silicon oxide and a carbon source, and calcining in an inert gas atmosphere to prepare a carbon-coated silicon oxide material; mixing the carbon-coated silica material, a conductive agent and a binder, and coating the mixture on a current collector to prepare an electrode plate; the method comprises the following steps: adding a carbon nanotube into molten lithium metal to prepare a modified lithium sheet; and assembling the electrode plate and the modified lithium plate into an electrolytic tank, and carrying out pre-lithiation treatment on the electrode