The effect of voltage bias on the yield and electrical properties of Exfoliated Graphene synthesized via electrochemical method

Abstract

Abstract Graphene has been gaining immense attention from scientists over the world for its exceptional properties, which makes it promising for several applications such as energy storage, electronic devices, and biomedicine. Graphene synthesis via the electrochemical exfoliation route offers a cheap, simple, eco-friendly, and scalable process for industrial purposes. In this work, the effect of voltage bias during electrochemical exfoliation on the electrical properties and yield of the obtained exfoliated graphene (EG) was studied. Graphite sheet as raw material was pre-treated by immersing it into H2SO4/H2O2 mixture before the electrochemical process. By applying the optimum voltage of 10 V, the electrochemical method was able to produce EG with yield as high as 40.95% in a relatively shorter time. Moreover, EG also demonstrated the highest electrical conductivity of 25.45 S/cm.