Herein, we report the synthesis of MXene/VS₂ composites for asymmetric supercapacitors using a hydrothermal method. Impressively, the resulting MXene/VS₂ electrode shows an outstanding specific capacity of 895.7 C g⁻¹ (1791.4 F g⁻¹) at 1 A g⁻¹, rate capability (587.5 C g⁻¹ (1175.0 F g⁻¹) at 20 A g⁻¹), and cycle performance (90.6% capacity retention after 10000 cycles), owing to its specific microstructures with connected nanosheets and enhanced electrochemical conductivity arising from the synergistic effect of VS₂ and conductive MXene. To achieve higher energy density in the solid-state asymmetric supercapacitor (ASC) device, Fe₃O₄ nanoparticles uniformly dispersed and encapsulated into the rGO sheets (Fe₃O₄@rGO) as a negative electrode is also designed. The obtained MXene/VS₂ was used as a cathode and Fe₃O₄@rGO acted as a anode. Further, an assembled MXene/VS₂//Fe₃O₄@rGO ASC device delivered an impressive specific capacitance of 365.4 C g⁻¹ (228.4 F g⁻¹) at 1 A g⁻¹, in addition, the device yielded the specific energy of up to 73.9 Wh kg⁻¹ at the corresponding specific power of 728.2 W kg⁻¹ with superior cycling performance (90.7% capacity retention after 10000 cycles at 8 A g⁻¹), demonstrating its high potential for applications in high-porformance energy storage devices.

在此，我们报告了使用水热法合成用于不对称超级电容器的 MXene/VS _{2复合材料。}令人印象深刻的是，所得 MXene/VS _2电极在¹ A g ^-1时显示出 895.7 C g ^-1 (1791.4 F g -1 ^{)的出色比容量，}在20 A g ^{−1 ）和循环性能（10000次循环后容量保持率为90.6%），这归因于其具有连接的纳米片的特定微观结构以及VS} ₂的协同效应增强的电化学电导率和导电 MXene。为了在固态非对称超级电容器（ASC）装置中实现更高的能量密度，还设计了Fe ₃ O ₄ 纳米粒子均匀分散并封装到rGO片（Fe ₃ O ₄ @rGO）中作为负极。将获得的 MXene/VS ₂用作阴极，Fe ₃ O ₄ @rGO 用作阳极。此外，组装好的 MXene/VS ₂ //Fe ₃ O ₄ @rGO ASC 器件在 1 A g ^{−1时提供了令人印象深刻的 365.4 C g −1} (228.4 F g ^{−1 ) 比电容}，此外，该器件在相应的 728.2 W kg ^-1比功率下产生高达 73.9 Wh kg ^-1的比能量，并具有出色的循环性能（在 8 A g ^-1下 10000 次循环后容量保持率为 90.7% ），证明它在高性能储能设备中的应用潜力巨大。