Cobalt carbonate hydroxide possesses interesting capacitive properties due to the unique crystal structure. Herein, the hierarchical Co3O4@Co-2(CO3)(OH)(2)dendritic structure was fabricated on carbon cloth with Co(3)O(4)nanoneedles as the inner core to enhance the conductivity. The loading efficiency of Co-2(CO3)(OH)(2)nanowhiskers had improved obviously, and the nanowires provided more electrochemical sites to facilitate the superior electrochemical energy storage capacity of supercapacitor. The dendritic electrode with the core-shell structure had a high area-specific capacitance (1541 mF cm(-2)at 1 mA cm(-2)), good rate capacitance (only 18.1% specific capacitance lost when the current density increased to 5 mA cm(-2)), as well as better electrochemical cycle stability (a capacitance retention of 72.1% after 5000 cycles at a high current density of 5 mA cm(-2)). The dendritic Co3O4@Co-2(CO3)(OH)(2)and activated carbon as cathode and anode, respectively, were used to assemble an asymmetric supercapacitor, possessing the better area-specific capacitance of 87 mF cm(-2)as well as well-deserved longevity retaining approximately 97.3% of initial capacitance even after 10,000 cycles at 1 mA cm(-2). The excellent properties stemmed from electro-active sites galore, strong adhesion between the core and shell, superior conductivity, as well as excellent ion transfer. The novel materials and feasible strategy are promising for next-generation hybrid supercapacitor with high performance.