▎ 摘　　要

This work reports the growth of graphene nanobuds (GNB) on Cu foil by chemical vapor deposition and its direct application as an electrode in lithium-ion batteries. The obtained novel GNB anode exhibited a superhigh specific capacity of 2813 mAh g-1 at a current rate of 4 A g-1 with a reversible coulombic efficiency of 78% in the first cycle. The most important advantage of using GNB as an anode was its outstanding cycled performance, maintaining a stable capacity of 1600 mAh g-1 at 8 A g-1 for at least 330 charge/discharge cycles with a coulombic efficiency of 99%. More significantly, the cell still maintained a retention capacity of 870 mAh g-1 when cycled at the very high current rate of 40 A g-1. The exceptional electrochemical performance in storage capacity and rate capability of GNB can be mainly attributed to the nanobuds having more loose space in their adjacent walls and hollow spaces; and to the intrinsic nano-oriented structure of few-layered graphene. This unique structure enables better Li-ion diffusion and higher Li-ion storage capacity. The outstanding electrochemical performance of the GNB as an anode places it as one of the most promising advanced carbon materials for next-generation lithium-ion batteries.