Conductive CNT network assisted BaTiO₃ nanocomposites for advanced supercapacitor electrodes

This work presents the synthesis of a BaTiO₃@CNTs nanocomposite and thoroughly studies its application for developing advanced supercapacitor electrode applications. Structural and surface characteristics were investigated by using SEM, EDX, XRD, BET, and XPS techniques, confirming the successful incorporation of BaTiO₃ nanoparticles into the conductive carbon nanotube (CNT) network, resulting in a composite with high surface area and enhanced electrical conductivity. The results revealed that the BaTiO₃@CNTs composite exhibited significantly improved capacitance compared to its pure BaTiO₃ and CNT components, attributed to the cooperative enhancement between the pseudocapacitive BaTiO₃ and the conductive CNT framework. The asymmetric BaTiO₃@CNT//AC device achieved a maximum energy density and a power density of 65.33 Wh kg^-1 and 4200 W kg^-1 (at 6 A g^-1), respectively. After 12 000 charge-discharge cycles, the device retained 95.35% of its initial capacitance and provided a coulombic efficiency of 93%, underscoring its excellent cycling stability and prolonged lifespan. Considering these results, we believe that this work is significantly useful for the development of promising energy storage applications.