Assembly of Ni(OH) ₂ -graphene hybrids with a high electrochemical performance by a one-pot hydrothermal method

A Ni(OH) ₂ -graphenehybrid with a three dimensional (3D) interconnected graphene network was prepared by a simple one-pot hydrothermal method. The 3D structure constructed of flexible and planar graphene sheets (GS) forms an effective electron transfer network and provides a continuous pore structure for ion transport. Moreover, this structure avoids the aggregation of GS and Ni(OH) ₂ , resulting in a high utilization rate of Ni(OH) ₂ at high contents. This study shows the hybrid has a high rate capability and cyclic stability and exhibits a high specific capacitance of ~1 461 F · g ^-1 at a scan rate of 5 mV · s ^-1 with a Ni(OH) ₂ mass loading of ~84 mass%.