Recent years have witnessed a significantly growing interest in employing graphene and related materials via CVD in the field of energy storages because of its versatile two-dimensional structures and fascinating properties for boosting the device performances.A vivid example is pertaining to the direct-CVD growth of graphene,which serves as a promising solution toward highly-conductive graphene flakes with structural versatility,in sharp contrast to the universal exfoliation approaches that lead to producing reduced graphene oxide(rGO).