Synergistic Charge Storage Enhancement in Supercapacitors via Ti₃C₂T_x MXene and CoMoO₄ Nanoparticles

MXene has emerged as a highly promising two-dimensional (2D) layered material with inherent advantages as an electrode material, such as a high electrical conductivity and spacious layer distances conducive to efficient ion transport. Despite these merits, the practical implementation faces challenges due to MXene's low theoretical capacitance and issues related to restacking. In order to overcome these limitations, we undertook a strategic approach by integrating Ti₃C₂T_x MXene with cobalt molybdate (CoMoO₄) nanoparticles. The CoMoO₄ nanoparticles bring to the table rich redox activity, high theoretical capacitance, and exceptional catalytic properties. Employing a facile hydrothermal method, we synthesized CoMoO₄/Ti₃C₂T_x heterostructures, leveraging urea as a size-controlling agent for the CoMoO₄ precursors. This innovative heterostructure design utilizes Ti₃C₂T_x MXene as a spacer, effectively mitigating excessive agglomeration, while CoMoO₄ contributes its enhanced redox reaction capabilities. The resulting CoMoO₄/T_i3C₂T_x MXene hybrid material exhibited 698 F g^-1 at a scan rate of 5 mV s^-1, surpassing that of the individual pristine Ti₃C₂T_x MXene (1.7 F g^-1) and CoMoO₄ materials (501 F g^-1). This integration presents a promising avenue for optimizing MXene-based electrode materials, addressing challenges and unlocking their full potential in various applications.