The innovation brought about by the discoveries in nanotechnology on the production of nanostructured materials has driven the rapid growth in the research of novel carbon nanomaterials. Through these research efforts, various carbon-based nanomaterials have been discovered to possess unique properties such as high surface area, high electrical conductivity, as well as a range of shapes, sizes and pore size distributions that are exploited extensively for supercapacitor applications. Despite extensively explored carbon-based supercapacitors, graphene has emerged in energy-related applications due to the virtue of intriguing properties, such as highly tuneable surface area, outstanding electrical conductivity, good chemical stability and excellent mechanical behaviour.

Graphene is frequently reported in carbon-based supercapacitors based on the structural complexity: zero-dimension (0D), one-dimension (1D), two-dimension (2D) and three-dimension (3D), and the performance of the graphene-based supercapacitors is mainly controlled by the structural and electrochemical properties of electrode materials. This chapter will comprehensively summarize the recent research efforts on graphene-based electrodes for enhancing the performance of the supercapacitor device.