Preparation method of hollow graphene and IVA group oxide composite material and product and application of hollow graphene and IVA group oxide composite material

The invention discloses a preparation method of a hollow graphene and IVA group oxide composite material. The preparation method comprises the following steps: S1, mixing a template agent and phthalocyanine; s2, performing high-temperature cracking on the material obtained in the step S1, and then cooling to room temperature; s3, adding an alcohol solvent and a surfactant into the material obtained in the step S2, uniformly mixing, adding a carbon group element source, stirring, adding water, carrying out hydrolysis reaction, washing a reaction product with an organic solvent, and drying to obtain composite powder; and S4, carrying out high-temperature treatment on the composite powder obtained in the step S3, and then washing and drying to obtain the hollow graphene and IVA group oxide composite material. The composite material can be used for preparing a porous negative electrode material of a lithium ion battery, shows good electrochemical performance in a half battery, and can effectively relieve volume e