Effect of Voltage Bias on Electrical Properties and Yield of Exfoliated Graphene Synthesized via Electrochemical Method
Oktaviardi Bityasmawan Abdillah (a), Octia Floweri (b), Ferry Iskandar (a,b,c*)

a) Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia
b) Research Center for Nanosciences and Nanotechnology (RCNN), Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia
c) National Center for Sustainable Transportation Technology (NCSTT), Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia
*ferry[at]fi.itb.ac.id

Abstract

Graphene has attracted immensely 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 some advantages such as cheap, simple, eco-friendly, and scalable 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.

Keywords: graphene, electrochemical exfoliation, voltage bias, electrical properties, yield

Topic: Material Science