Facile preparation of flower-like graphene-nanosheet clusters with the assistance of copper particles and their application in supercapacitors

Graphene-nanosheet clusters with flower-like hierarchical structure (f-GNSCs) were facilely fabricated by an electrochemical method with the assistance of copper particles. Such unique 3D macroporous graphene (GE) structure possesses remarkable electrochemical capacitance (up to 347.1 F g−1), good rate capability and cycle stability.