Recent Progress in Porous Graphene and Reduced Graphene Oxide‐Based Nanomaterials for Electrochemical Energy Storage Devices

Graphene‐based nanocomposites are characterized by high mechanical strength, excellent electrical conductivity, and outstanding thermal and chemical stability. Additionally, the combination of versatile functionalization chemistry and simplicity of large‐scale synthesis makes graphene ideal for electrode materials for energy storage devices. To improve the electrochemical performance even further, recent research has focused on the preparation of porous graphene structures, either by creating holes in the graphene sheets or by assembling them into a 3D porous framework. Porous graphene and reduced graphene oxide allow for rapid ion diffusion and display high real surface area. In this review paper, the conventional methods for the preparation of porous graphene are summarized and recent progress in porous graphene‐based nanomaterials for electrochemical energy storage devices is discussed. The different ways porous graphene can be synthesized and its application in energy storage devices are summarized in this review. Porous graphene‐based electrodes display enhanced performance over normal graphene, since the pores allow for rapid ion diffusion. Particular focus is given to porous graphene‐based batteries and supercapacitors.