[en] Highlights: • Interfacial engineering on Co-metal organic framework generates Co₃O₄ nanosheets. • Co₃O₄ nanosheets were stabilized on carbon cloth by hydrophilic carbon coating. • Abundant oxygen vacancies were introduced into Co₃O₄ nanosheets. • v-Co₃O₄/CC composite exhibits high specific capacitance (920 F g⁻¹ at 1 A g⁻¹) and excellent stability. • Asymmetric supercapacitor shows a maximum volumetric energy density of 0.74 mWh cm⁻³ at ap ower density of 14.70 mW cm⁻³. -- Abstract: Co₃O₄ is a promising pseudocapacitive material with a high theoretical capacity. We demonstrate herein a facile interfacial engineering toward Co-metal organic frameworks (Co-MOFs) derived Co₃O₄ nanosheets for improving the overall capacitive performance. Firstly, a thin hydrophilic carbon layer was coated onto carbon cloth (CC) to stablize the interfacial coordination effect between Co₃O₄ and carbon fibres. Secondly, oxygen vacancies by reducing Co₃O₄ was introduced to improve the electron and ions transfer on the interface between Co₃O₄ and electrolyte. The unique Co₃O₄ structure and composition endow the optimal v-Co₃O₄/CC composite with significantly improved specific capacity (414 C g⁻¹ at 1 A g⁻¹) and excellent stability (0.00174% capacity loss per cycle for 15000 cycles). Asymmetric supercapacitor by assembling v-Co₃O₄/CC composite as positive electrode with the same MOF derived carbon nanosheets as negative electrode demonstrates a high volumetric and gravimetric energy density of 0.74 mWh cm⁻³ (14.7 mW cm⁻³) and 45.3 Wh kg⁻¹ (915 W kg⁻¹), respectively. This work might provide a simple but efficient approach for boosting the pseudocapacitive performance of transition metal oxides.