This study explores the use of MXene nanosheets, specifically Ti₂CTₓ, as a negative electrode material for high-power sodium-ion hybrid capacitors. The research demonstrates that the pseudocapacitance of Ti₂CTₓ offers a higher specific capacity and rate capability compared to conventional electrodes. By utilizing Ti₂CTₓ as a negative electrode, a prototype sodium-ion full cell with an alluaudite Na₂Fe₂(SO₄)₃ positive electrode operates at a high voltage of 2.4 V, delivering 90 and 40 mAh g⁻¹ at 1.0 and 5.0 A g⁻¹, respectively. The pseudocapacitance of Ti₂CTₓ allows for charge storage without significant structural changes, enabling high energy and power densities. The electrode exhibits excellent electrochemical performance, with a reversible capacity of ~175 mAh g⁻¹ and good cycle stability. The full cell demonstrates high specific energy (260 Wh kg⁻¹) and specific power (1.4 kW kg⁻¹), overcoming the trade-off between energy and power densities in conventional electrochemical energy storage systems. The study highlights the potential of MXene nanosheets as a promising material for advanced sodium-ion hybrid capacitors, offering high capacity, stability, safety, and power. The results suggest that Ti₂CTₓ could be a high-performance electrode material for future energy storage applications. The research also discusses the potential for further improvements in the performance of Ti₂CTₓ through advanced synthesis methods.This study explores the use of MXene nanosheets, specifically Ti₂CTₓ, as a negative electrode material for high-power sodium-ion hybrid capacitors. The research demonstrates that the pseudocapacitance of Ti₂CTₓ offers a higher specific capacity and rate capability compared to conventional electrodes. By utilizing Ti₂CTₓ as a negative electrode, a prototype sodium-ion full cell with an alluaudite Na₂Fe₂(SO₄)₃ positive electrode operates at a high voltage of 2.4 V, delivering 90 and 40 mAh g⁻¹ at 1.0 and 5.0 A g⁻¹, respectively. The pseudocapacitance of Ti₂CTₓ allows for charge storage without significant structural changes, enabling high energy and power densities. The electrode exhibits excellent electrochemical performance, with a reversible capacity of ~175 mAh g⁻¹ and good cycle stability. The full cell demonstrates high specific energy (260 Wh kg⁻¹) and specific power (1.4 kW kg⁻¹), overcoming the trade-off between energy and power densities in conventional electrochemical energy storage systems. The study highlights the potential of MXene nanosheets as a promising material for advanced sodium-ion hybrid capacitors, offering high capacity, stability, safety, and power. The results suggest that Ti₂CTₓ could be a high-performance electrode material for future energy storage applications. The research also discusses the potential for further improvements in the performance of Ti₂CTₓ through advanced synthesis methods.