Two-dimensional transition metal carbides (nitrides) MXenes have excellent electrochemical properties and be hoped as a promising electrode material for supercapacitors. However, MXene nanosheets are prone to aggregate due to van der Waals interaction, which affect its electrochemical performance. In this study, nitrogen-doped Ti₃C₂ (N-Ti₃C₂), which hydrothermally prepared from MXene Ti₃C₂, was assembled with metallic zinc to obtain a hybrid capacitor system in 1 M ZnSO₄ aqueous electrolyte. In the voltage range of 0.05–1.2 V, the specific capacitance of this capacitor can reach 247.9 F g⁻¹ (corresponding to an energy of 45.54 Wh kg⁻¹). At high current density, it can quickly charge and discharge in 27 s, accompanied a high power output of 4093 W kg⁻¹ and an energy of 30.99 Wh kg⁻¹. It presents an outstanding cycling stability with 88.34% capacity retention over 6000 cycles. The self-discharge rate in 240 h is only 1.24 mV h⁻¹. The high electrochemical performance mainly based on the introduction of nitrogen heteroatoms in cathode of N-Ti₃C₂, which show the ion adsorption/desorption, and the deposition/exfoliation of Zn (Zn²⁺) on the Zn anode to combine a hybrid capacitor.

二维过渡金属碳化物（氮化物）MXene具有出色的电化学性能，并有望作为超级电容器的有前途的电极材料。然而，由于范德华相互作用，MXene纳米片易于聚集，这会影响其电化学性能。在这项研究中，将由MXene Ti ₃ C ₂水热制备的氮掺杂Ti ₃ C ₂（N-Ti ₃ C ₂）与金属锌组装在一起，以在1 M ZnSO ₄水性电解质中获得混合电容器系统。在0.05–1.2 V的电压范围内，该电容器的比电容可达到247.9 F g ^-1（对应于45.54 Wh kg ^-1的能量）。在高电流密度下，它可以在27 s内快速充电和放电，伴随着4093 W kg ^-1的高功率输出和30.99 Wh kg ^-1的能量。它具有出色的循环稳定性，在6000次循环中的容量保持率为88.34％。在240小时内的自放电速率仅为1.24mV h ^-1。较高的电化学性能主要是由于在N-Ti ₃ C ₂阴极中引入了氮杂原子，这些杂原子表现出离子吸附/解吸作用，以及Zn（Zn ²⁺）在Zn阳极上的沉积/剥落，从而形成杂化体。电容器。