Method for manufacturing flexible graphene electrically conductive film

A method for manufacturing a flexible graphene electrically conductive film, comprising the following steps:

• (1) providing a base and forming a graphene layer on a surface of the base;
• (2) providing polyvinyl alcohol, dissolving polyvinyl alcohol in water and heating to form a colloidal solution, which after cooling, forms a polyvinyl alcohol colloidal solution;
• and coating the polyvinyl alcohol colloidal solution on a surface of the graphene layer and drying so as to form a supporting layer on the surface of the graphene layer;
• (3) removing the base from the graphene layer to obtain the graphene layer that is covered with the supporting layer;
• and
• (4) placing the graphene layer that is covered with the supporting layer in water to allow the supporting layer on the surface of the graphene layer to dissolve in water thereby obtaining a flexible graphene electrically conductive film that is free of surface residue.