| abstract |
Disclosed herein is a method of preparing graphene capable of easily preparing a graphene sheet having a small thickness and a large area, and a dispersion composition of graphene obtained by the method. The method for producing graphene includes applying a physical force to a dispersion of a carbon base material including a graphite or a derivative thereof and a dispersant, wherein the dispersant comprises a mixture of a plurality of polyaromatic oxides, and the content thereof is 60% by weight or more. A large polyarylene oxide having a molecular weight of 300 to 1000, and the graphite or a derivative thereof is formed into a graphene sheet having a nanometer thickness under application of a physical force. |