The purpose of the present study is to report the synthesis of a porous composite constructed from chicken feathers (CF) and nickel and cobalt salts and its application as a new material for modification of positive electrode surface used in supercapacitor as well as hydrogen and oxygen evolution. In this regard, we used waste CF as a biomass precursor and nitrate salts of nickel and cobalt to synthesize a highly porous composite through a solvothermal reaction. After characterization of nanocomposite using different physical and electrochemical techniques, it was used in fabrication of an electrochemical supercapacitor as well as hydrogen and oxygen evolution. The composite demonstrated remarkable electrochemical properties such as fast electrochemical reactions, high conductivity, and high reversibility. In addition, the prepared nanocomposite showed high-specific capacitance of 2000 F g −1 (with current density of 0.5 mA cm −2 or 1 A g −1 ) as a supercapacitor. It also shows high

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