High-performance graphene paper and preparation method thereof

The invention relates to a graphene paper with excellent overall performance and a preparation method thereof for solving the problem that the mechanical property and the conductivity of the graphene paper in the present preparation technique are hard to improve simultaneously. The invention provides a simple method for preparing high-performance graphene paper, which comprises the following steps of: firstly, using a two-step chemical reduction method to obtain high-conductivity graphene powder, then putting the prepared high-conductivity graphene powder into a mold, and performing thermal-treatment molding at 100-900 DEG C under a pressure of 1-10 Mpa in certain vacuum, argon or hydrogen environment, and thus obtaining a graphene paper with excellent mechanical property and conductivity both. The mechanical strength and conductivity of the graphene paper are both higher than that of the present reported graphene paper, and the graphene paper disclosed by the invention have great application prospect in all