Core-shell structured Co3O4@NiCo2O4 electrodes grown on flexible carbon fibers with superior electrochemical properties

In this work, Co3O4@NiCo2O4 core-shell structures with high yield are fabricated on flexible carbon cloth using a facile method. The as-fabricated core-shell structures present an excellent areal capacitance of 4.35 F cm−2 at 1 mA cm−2 and outstanding cycling stability with ~4.2% loss after 6000 cycles at a charge-discharge current density of 10 mA cm−2, which demonstrate their potential applications in energy storage applications.165