▎ 摘　　要

A novel self-assembled flower-like (Co(OH)(2))/N-doped graphene composites were prepared using a facile sol-gel process, which shows a high specific capacitance (2276 F g(-1) at 1 A g(-1)) and good capacitance retention rate (83% at 20 A g(-1)). Moreover, only a 6.5% loss in specific capacitance was observed after more than 2000 cycles (at 10 A g(-1)). These results suggested that the flowery Co(OH)(2) with three-dimensional architectures on N-doped graphene leads to a synergistic performance, which results in enhanced electrochemical performance of the overall system. (C) 2016 Elsevier B.V. All rights reserved.