Layered double hydroxides (LDHs) are promising electrode materials for supercapacitor applications owing to their high specific capacities and tunable compositions. However, poor conductivity, natural tendency to agglomerate, insufficient long-term stability, and high synthesis cost of LDHs limit their widespread adoption. A precise hybridization approach- integrating LDHs with a rigid, conductive, and electroactive surface matrix via a simple and low-cost synthesis technique, has emerged as an effective way to mitigate these challenges. Herein, we forwarded a superlattice engineering strategy to construct a nanohybrid composite by integrating the 3D superstructures of 2D CoMn-LDH nanosheets onto dimethyl sulfoxide (DMSO, (CH₃)₂-S = O) functionalized Ti₃C₂T_x (D-MXene) scaffold via room-temperature co-precipitation. The proposed CoMn-LDHs@D-MXene hybrid composite exhibited a specific capacity of 148 mAh/g at current density of 1 mA/cm², pronounced rate capability of 56.5%, and remarkable long-term cyclic durability of 92.78%. Moreover, a high-performance hybrid asymmetric supercapacitor device based on this proposed hybrid composite (CoMn-LDH@D-MXene//N-doped graphene hydrogels) was assembled which delivered a specific energy density of 37.34 Wh/kg at a power density of 212 W/kg and long-term durability with 92% capacity retention after 5000 cycles. This simple, economical, and efficient synthesis route paves a promising pathway for advancing next-generation supercapacitor technologies.