▎ 摘　　要

Ultra-thin Ni(OH)(2) nanosheets and reduced graphene oxide (Ni(OH)(2)/rGO) composite was successfully synthesized via a facile solvothermal method. Field emission scanning electron microscopy and high-resolution transmission electron microscopy measurements show the porous Ni(OH)(2) nanosheets are flatly supported on rGO sheets to form a two-dimensional composite with high specific surface area (210 m(2) g(-1)). Serving as the electrode material for supercapacitors, the Ni(OH)(2)/rGO composite exhibits high specific capacitance (1886 F g(-1) at 5 A g(-1), 1362 F g(-1) at 30 A g(-1)) and excellent cycling stability (similar to 70% capacity retention after 1000 cycles at 10 A g(-1)) due to its unique two-dimensional heterostructure and synergistic effect between Ni(OH)(2) and rGO, indicating two-dimensional Ni(OH)(2)/rGO composite is promising electrode material for the electrochemical energy storage applications. (C) 2016 Elsevier B.V. All rights reserved.