Nanostructured binary metal oxide-decorated carbon nanofibers (CNFs) were utilized as flexible electrodes for hybrid supercapacitor applications. Polyacrylonitrile (PAN)/lignin based carbon nanofibers (PAN/lignin CNFs) with different contents of lignin were prepared by electrospinning, stabilization and carbonization. Afterwards, the NiCo₂O₄ oxides were deposited on the surface of CNFs by a facile hydrothermal method without any toxic reagents. SEM images confirmed that the NiCo₂O₄ (nanosheet and nanoneedle) nanostructures were uniformly grown on the surface of every carbon fiber. The obtained flexible NiCo₂O₄-decorated PAN/lignin CNFs with 50% lignin (NiCo₂O₄@CNF55) electrode exhibited high specific capacitance of the ∼1757 F g⁻¹ at 2 mA cm⁻² and excellent cyclability with ∼138% capacitance retention after 5000 cycles at 7 mA cm⁻², suggesting lower internal resistance and higher electrochemical reversibility. In addition, the NiCo₂O₄@CNFs//N-rGO solid state asymmetric supercapacitor devices were assembled in order to evaluate their practical applications. The NiCo₂O₄@CNF55//N-rGO asymmetric supercapacitor device exhibited a specific capacitance of 134.3 F g⁻¹ at a current densities of 1 A g⁻¹, and possessed a maximum energy density of 47.75 Wh kg⁻¹ with a power density of 799.53 W kg⁻¹.

纳米结构的二元金属氧化物修饰的碳纳米纤维（CNF）被用作混合超级电容器应用的柔性电极。通过静电纺丝，稳定化和碳化制备了木质素含量不同的聚丙烯腈（PAN）/木质素基碳纳米纤维（PAN /木质素CNF）。然后，通过简便的水热方法将NiCo ₂ O ₄氧化物沉积在CNF的表面上，而无需使用任何有毒的试剂。SEM图像证实了NiCo ₂ O ₄（纳米片和纳米针）纳米结构均匀地生长在每根碳纤维的表面上。获得的具有50％木质素的柔性NiCo ₂ O ₄装饰的PAN /木质素CNF（NiCo ₂O ₄ @ CNF55）电极在2 mA cm ^-2时表现出约1757 F g ^-1的高比电容，在7 mA cm ^-2的5000次循环后具有出色的可循环性和约138％的电容保持率，表明较低的内阻和较高的电化学性能可逆性。另外，组装了NiCo ₂ O ₄ @ CNFs // N-rGO固态不对称超级电容器器件，以评估其实际应用。的镍钴₂ ö ₄ @ CNF55 // N-二RGO不对称超级电容器装置表现出134.3 F G的特定电容^-1在1A g的电流密度^-1，并且具有47.75 Wh kg ^-1的最大能量密度和799.53 W kg ^-1的功率密度。