The Fabrication of Carbon Nanofibers Paper Supported CoO4 Nanocomposite and Their Electrochemical Properties.

A hierarchical network architecture consisting of Co3O4 nanoflakes network (nanonet) coats on a carbon fiber paper. For this 3 dimension (3D) architecture, the electrode shows ideal pseudocapacitive behavior and the maximum specific capacitance of 210 F/g can be reached at the constant current density of 1 A/g in 1 M KOH electrolyte, still retaining 85% of the initial capacitance after 1000 cycles of repeating charge-discharge. The improved capacity may be attributed to the unique hierarchical network structures, which improve electron/ion transport, enhancing the kinetics of redox reactions and facilitate facile stress relaxation during cycling.