▎ 摘　　要

Using a facile solid-state mechanochemical method by ball milling, we successfully synthesized the first directly bonded graphene-C-60 hybrid, for which LiOH is found to play a crucial role as the catalyst. The hybrid structure of graphene-C-60 is confirmed by FTIR, Raman, XRD and XPS characterizations, and its conformation is proposed, featuring the direct bonding of graphene nanoplatelets and C-60 via two C-C single bonds. SEM measurement suggests that severe edge distortions occur for graphene-C-60 hybrid, and HR-TEM study indicate the covalent attaching of C-60 molecules onto the edge of graphene nanoplatelets. The graphene-C-60 hybrid is applied as a carbon-based electrocatalyst toward oxygen reduction reaction (ORR), showing improved ORR electrocatalytic activity than the pristine graphite.