Literature review and research background.- Structural evolution of the thermally reduced graphene nanosheets during annealing.- Hierarchical amination of graphene for electrochemical energy storage.- Free standing graphene film with high conductivity by thermal reduction of self-assembled graphene oxide film.- Template-directed macroporous \'bubble\' graphene film for the application in supercapacitors.- SnO 2 @graphene composite electrodes for the application in electrochemical energy storage.- Main conclusions and plan of further work.