Exploring the Potential of Graphene as an EMI Shielding Material – An Overview

Graphene- 2D, single layered, one atom thick material has gained high importance as an electromagnetic interference shielding material due to its superior electrical property and large aspect ratio.It is an allotrope of carbon with sp2 configuration that exhibits excellent mechanical and thermal properties. Graphene have been used as electromagnetic interference shielding material in the form of ultrathin flexible film, paper, laminates, microcellular foams, sheets etc. Electromagnetic shielding efficiency of graphene can be as high as 135 dB, whereas the commercial applications requirement is only 20 dB. The present review work mainly focuses on the use of graphene as an EMI shielding materialin composites, free standing films, foams and aerogels. This study also reviews the use of different dopants to dope graphenethat can be used as EMI shielding material. Methods of production of different forms of graphene and mechanisms of EMI shielding have been briefly discussed in the current review. The study reveals that the highest EMI SE is exhibited by graphene aerogels, as high as 135 dB. The study explores the effective use of graphene as an EMI shielding material in various electronic devices. Despite possessing many superior properties, few limitations that exist to the usage of grapheme have also been listed out in this review