Designing of Ti₃C₂T_x/NiCo-MOF nanocomposite electrode: a versatile platform for electrochemical-based energy storage devices

A simple synthesis method has been developed to improve the structural stability and storage capacity of MXenes (Ti₃C₂T_x)-based electrode materials for hybrid energy storage devices. This method involves the creation of Ti₃C₂T_x/bimetal-organic framework (NiCo-MOF) nanoarchitecture as anodes, which exhibit outstanding performance in hybrid devices. The 2D Ti₃C₂T_x nanorods are combined with NiCo-MOF nanoflakes through hydrogen bonding to create 3D Ti₃C₂T_x/NiCo-MOF composite. The electrochemical characteristics of Ti₃C₂T_x@NiCo-MOFs nanocomposite were measured. Due to enhancements in charge transfer and redox properties, the composite electrode consisting of Ti₃C₂T_x/NiCo-MOFs demonstrated a specific capacity of 1635.1 Cg⁻¹, significantly surpassing that of pure NiCo-MOFs (844.5 Cg⁻¹). Additionally, the hybrid supercapacitor device (Ti₃C₂T_x/NiCo-MOFs//AC) showed a specific capacity (Qs) of 222.53 Cg⁻¹ with an energy density (E_d) of 56 Wh/kg and a power density (P_d) of 2800 W/kg by using KOH as an electrolyte. The device achieved an impressive capacity recovery rate of 86.7% after being tested with up to 5000 charging and discharging cycles. This study opens new ways to make safe and reliable supercapacitors using environmentally friendly materials. The findings underscore the significant potential of Ti₃C₂T_x/NiCo-MOF in advancing the field of high-performance hybrid energy storage devices.