2D Graphene-based Macroscopic Assemblies for Micro-Supercapacitors.
Rapid development of portable and wearable electronic devices has triggered the increased research interest of small-scale power sources, especially for the micro-supercapacitor (MSC) because of its high power density, long service life and fast charging and discharging rate. Graphene, as an ideal two-dimensional energy storage electrode material with good conductivity, high quantum capacitance, and large specific surface area, can be used as building block for multi-dimensional architecture for MSC. Much efforts have been devoted to construct structures of different dimensions for the advanced graphene-based MSCs (GMSC). In this review, we summarize the recent progress of graphene-based macroscopic assemblies in MSCs, including 1D fiber GMSCs, 2D planar GMSCs and 3D in-plane or stacked GMSCs, and discuss the relationship between the structures and applications of the devices. In addition, future prospects and challenges in the MSCs are also discussed.