Nitrogen-doped reduced graphene oxide-Ni(OH)2-built 3D flower composite with easy hydrothermal process and excellent electrochemical performance

A composite based on nitrogen-doped reduced graphene oxide and Ni(OH)2 is prepared by an easy two-step hydrothermal method. With the enhanced electrochemical activity upon nitrogen doping and the unique three-dimensional flower structure, the obtained composite exhibits high capacitance, excellent rate capability, good cycle life, etc.