2D Materials; Energy Devices; Exfoliation; Electrolyte Membrane; Nanocomposites; Solar Cells This two-volume handbook summarizes research for different 2D nanomaterials such as graphene and its derivatives and 2D polymers for energy applications such as in batteries and fuel cells. solar cells supercapacitors transition metal carbides/nitrides/carbonitrides transition metal chalcogenides transition metal oxides/hydroxides