Fiber-shaped supercapacitors (FSSCs) are emerging potential power sources for next-generation flexible and wearable miniaturized electronic devices. However, the practical application of FSSCs is hindered by their low energy density due to limited design and constraints in fiber-shaped electrodes production. Herein, a rational design of wet spun MXene (Ti₃C₂T_x)/PAN fibers derived multichannel porous MXene/Carbon Fiber (W-MX/CF) is reported as a negative electrode (negatrode), and ultrathin NiCo₂S₄ electrodeposited W-MX/CF (NiCo₂S₄@W-MX/CF) as a positive electrode (positrode) for the fabrication of an asymmetric FSSC. It demonstrates high areal capacitance from both the negatrode (C_A = 2160 mF cm⁻²) and positrode (C_A = 1421 mF cm⁻²) fabricated from 80 wt% MXene loaded CF (W-MX/CF-4) with optimized multichannel porous features and faradaic NiCo₂S₄ nanosheets arrays grown on W-MX/CF-4. Solid-state fiber-shaped asymmetric supercapacitor was assembled using NiCo₂S₄-13@W-MX-4 and W-MX/CF-4 as positrode and negatrode, respectively, with PVA/KOH as solid electrolyte. The device exhibits a remarkable energy density of 40.70 mWh cm⁻³ at a power density of 301.51 mW cm⁻³, demonstrating an efficient FSSC. The present work shows a novel way to enhance the performance of FSSCs by exploiting synergistic effects between MXene and carbon fiber derived from PAN, prepared by a facile wet-spinning method employing a solvent/non-solvent exchange process.

纤维状超级电容器 (FSSC) 是下一代柔性和可穿戴小型化电子设备的新兴潜在电源。然而，由于有限的设计和纤维形电极生产的限制，FSSC的实际应用受到其低能量密度的阻碍。在此，湿纺 MXene (Ti ₃ C ₂ T _x )/PAN 纤维衍生的多通道多孔 MXene/碳纤维 (W-MX/CF) 的合理设计被报道为负极（negatrode）和超薄 NiCo ₂ S ₄电沉积 W-MX/CF (NiCo ₂ S ₄@W-MX/CF）作为制造不对称 FSSC 的正极（正极）。_{它展示了来自负电极 (C A}  = 2160 mF cm ^-2 ) 和正电极 (C _A  = 1421 mF cm ^-2 )的高面积电容，由 80 wt% 的 MXene 负载 CF (W-MX/CF-4) 制成，并经过优化在 W-MX/CF-4 上生长的多通道多孔特征和法拉第 NiCo ₂ S _{4纳米片阵列。采用NiCo 2} S ₄ -13@W-MX-4和W-MX/CF-4分别作为正极和负极，以PVA/KOH作为固体电解质，组装了固态纤维形非对称超级电容器。该器件具有 40.70 mWh cm ^{-3的非凡能量密度}在301.51 mW cm ^-3的功率密度下，展示了高效的FSSC。本工作展示了一种通过利用 MXene 和源自 PAN 的碳纤维之间的协同效应来提高 FSSC 性能的新方法，该方法是通过采用溶剂/非溶剂交换过程的简便湿纺方法制备的。