▎ 摘　　要

NOVELTY - An energy storage electrode comprises a graphene/carbon nanoflower composite material (m1) comprising multi-layered graphene sheets and carbon nanoflowers which are circular curved multi-layered carbon sheets optionally doped with a silicon core and having a diameter of 100 nm or less. USE - Electrode e.g. anode is used for energy storage system e.g. supercapacitor and lithium-ion battery (all claimed). ADVANTAGE - The energy storage electrode has improved stability with high potential (supercapacitor performance), and provides battery having high capacity and improved cycle life. The graphene sheet has excellent electroconductivity, thermal conductivity, flexibility, chemical stability and thermal stability. The graphene/carbon nanoflower composite material has enhanced lithium-ion transport property, and prevents pulverization and cracking of the electrode material because of the rotationally disordered graphene layers.