Hierarchical Nanohybrids with Graphene Tubes-Networks Decorated Microspherical Graphene Assemblies for Supercapacitors

摘要

Graphene belongs to an emerging class of ultrathin carbon membrane materials with a high specific surface area, chemical stability, and high electrical and thermal conductivities. Owing to these intrinsic physicochemical characteristics, graphene has been extensively investigated for widespread applications in nanodevices, sensors, catalysis, energy storage systems, and biomedicine as an alternative to porous carbon. In particular, graphene has received increasing attention as an electrode material for electrical double-layer capacitors (EDLCs) due to its high specific surface area and high intrinsic electrical conductivity. Recently, there have been tremendous achievements for improving the gravimetric capacitance of graphene.