▎ 摘　　要

Synthesis of graphene dendrites with controlled morphologies (flower-like and tree-like) were achieved by changing applied potential in electrochemical reaction. The growth of graphene dendrites proceeded with two different oriented attachment modes. When applied potential a parts per thousand currency sign60 V, graphene nanosheets preferentially extended into branches, resulting in the formation of flower-like dendrites. While applied potential a parts per thousand yen60 V, more graphene nanosheets were produced on electrode and grew along the stem directions, leading to the formation of tree-like dendrites. Moreover, the effects of different morphology of graphene dendrite on its electrochemical performances were investigated. The results showed that tree-like dendrite electrode had a larger specific capacitance (138 F/g at 100 mv/s) than that of flower-like dendrite electrode. Generally, graphene dendrites with controlled morphologies might have promising applications as electrode materials for supercapacitors.