Abstract
Graphene is a special allotrope of carbon with two-dimensional monolayered sheet network of sp(2) hybridized carbon. It possesses novel electronic, mechanical and conducting properties and these properties could be exploited in the field of scientific community in nanotechnology. Numbers of methods have been developed for the production of graphene such as micromechanical exfoliation, chemical vapor deposition, epitaxial growth, arc discharge method, intercalation methods in graphite, unzipping of CNTs, electrochemical and chemical methods. Graphene and graphene based composite materials are highly versatile materials and find wide applications in numerous fields of research. In this review, we discussed about different kind of graphene based electrode materials, which were applied in energy storage devices (supercapacitors, batteries, fuel cells and solar cells), electrochemical sensors, biosensors and pesticide sensors are discussed.