Abstract
A ‘gold rush’ has been triggered all over the world for exploiting the possible applications of graphene‐based nanomaterials. For this purpose, two important problems have to be solved; one is the preparation of graphene‐based nanomaterials with well‐defined structures, and the other is the controllable fabrication of these materials into functional devices. This review gives a brief overview of the recent research concerning chemical and thermal approaches toward the production of well‐defined graphene‐based nanomaterials and their applications in energy‐related areas, including solar cells, lithium ion secondary batteries, supercapacitors, and catalysis.