Truncated diamond CoMoO4 for the first time was fabricated by facile template free method. Hydrothermal method was applied for support synthesis and AgBr nanoparticles was loaded by precipitation. All samples were fully characterized by physic-electro-chemical methods include XPS, XRD, EDX, HRTEM, SAED, N2 adsorption-desorption isotherms, DRS, SEM, CV and EIS. Direct Z-scheme heterojunction composite was fabricated and supercapacitive performance of composite was studied for capability to use in charge storage devices. The results show that the composite has good electrochemical conductivity and suitable charge storage capability with high stability during continues charge – discharge cycles. The results demonstrated that the increased performance might be due to the Z-scheme charge transfer mechanism inside the heterojunction, which can moderate the direction of charge migration, boost charge transfer, and maintain the high redox capacity. The Electrochemical studies show that presence of AgBr, increase the electrical conductivity of CoMoO4 electrode. Enhancing the specific capacitance of electrode from 114 for CoMoO4 to 304 F.g− 1 for electrode and increasing the mechanical stability of composite one are some benefits of using AgBr in CoMoO4 system.