Porous microspheres copper cobalt carbonate hydroxides (CuxCo2⿿xCH) pseudocapacitive electrode material comprised of nanoplates via a facile hydrothermal method were presented. Significantly, the crystalline structure, morphology and electrochemical performance of the CuxCo2⿿xCH can be readily manipulated by varying the Cu/Co molar ratios. Among various stoichiometries of CuxCo2⿿xCH porous microspheres studied, Cu1.79Co0.21CH consisted of nanoplates with a mean thickness of ⿼35nm showed a high specific capacitance of 789Fg⿿1 at a current destiny of 1Ag⿿1 and good rate ability. Furthermore, the optimized Cu1.79Co0.21CH electrode also exhibited remarkable high cycling stability, ca 77.5% after 3000 charge/discharge cycles at current density of 5Ag⿿1. An asymmetric device was constructed from optimized Cu1.79Co0.21CH materials on nickel foam (NF) as cathode electrode and graphene on NF as anode electrode in a 6M KOH electrolyte. The asymmetric Cu1.79Co0.21CH/NF//graphene/NF supercapacitor device delivered a specific capacitance of 60.5Fg⿿1 in a potential range of 0⿿1.6V. A high energy density of 21.5Whkg⿿1 was achieved at the power density of 200Wkg⿿1. More significantly, the designed device exhibited excellent cycling stability with 73.3% capacity retention after 5000 cycles.