Composite material of graphene intercalated silicate and preparation method thereof

The invention discloses a composite material of graphene intercalated silicate and a preparation method thereof. The composite material comprises expandable silicate and graphite oxide, wherein the two form a structure that graphite oxide is inserted between silicate layers; and the mass ratio of the expandable silicate to the graphite oxide is (2-20):1. The intercalated material prepared according to the invention can reduce the agglomeration of the graphene material and maintains single-layer graphene to the greatest degree; and without grafting of an organic group, the cost is low, and the efficiency is high.