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In recent times, microwave synthetic strategies have been considered as one of the facile methods for the development of efficient supercapacitor electrodes. Reduced graphene oxide containing cobalt oxide (rGO@Co₃O₄/CoO) hybrids were synthesized via single-step microwave irradiation in which the uniform Co₃O₄/CoO nanoparticles were attached in thin layers of rGO nanosheets. During short time of single-step microwave irradiation process, three kind of phenomena occurs as (i) reduction and exfoliation of graphite oxide into rGO nanosheets, (ii) decomposition of cobalt(II) acetate into Co₃O₄/CoO nanoparticles and (iii) rGO nanosheets covers the Co₃O₄/CoO nanoparticles. The BET surface area and pore diameter range of rGO@Co₃O₄/CoO hybrids were 133.2 m²g⁻¹ and 5–45 nm, respectively, which shows the mesoporous structure formation of hybrids. Electrochemical evaluations of rGO@Co₃O₄/CoO …