This PhD thesis presents the latest findings on the tunable surface chemistry of graphene/graphene oxide by systematically investigating the tuning of oxygen and nitrogen containing functional groups using an innovative carbonization and ammonia treatment. In addition, novel macroscopic assemblies or hybrids of graphene were produced, laying the theoretical foundation for developing graphene-based energy storage devices. This work will be of interest to university researchers, R&D engineers and graduate students working with carbon materials, energy storage and nanotechnology.

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.- SnO₂@graphene composite electrodes for the application in electrochemical energy storage.- Main conclusions and plan of further work.