In this communication, high specific capacitance of CuS nanotubes (2393 F g⁻¹ at 10 mV s⁻¹ and 2175 F g⁻¹ at 15 A g⁻¹) was obtained in redox active polysulfide electrolyte through combination of the pseudocapacitance of CuS nanotubes in electrolyte and the faradic capacitance of electrolyte at the electrode electrolyte interface.