Recently, it has been found that the carbon nanotubes (CNTs) and graphene could prove to be the most promising carbonaceous fillers in polymers nanocomposites field due to their better structural and functional properties. Their uniform dispersion in the polymer matrix leads to significant improvements in their several properties. This book reviews the effect of nanofillers i.e., CNTs, derivatized CNTs and graphene on the electromagnetic interference (EMI) shielding properties of polycarbonate nanocomposite and its application in aerospace, automobile, sports, electronic sectors and various industries. The comparative analysis of carbon-based fillers on the different properties of polycarbonate nanocomposites is also included.