Finding a convenient low-cost method to prepare a promising charge storage material for high-performance supercapacitors remains always a critical challenge. Herein, the facilely eco-friendly electroless electrolytic (EE) technique was employed to deposit a worm-like Ni-Co-P nanofilm directly on nickel foam (NF) substrate. Gross morphology and microstructure of the as-prepared active material were confirmed by SEM, EDS and XRD techniques. The supercapacitive properties of Ni-Co-P/NF electrode was studied in 6.0 M KOH solution by cyclic voltammetry (CV), galvanostatic charging/discharging (GCD) and electrochemical impedance spectroscopy (EIS). CV curves displayed a pair of two broad current peaks (I_p) associated with the reversible redox reactions within the fabricated Ni-Co-P. The high slope value of the linear relationship I_p vs. υ^1/2 reveals readily accessible diffuse pathways due to a porous texture of Ni-Co-P active material. Its specific capacitance increased with the decrease in the scan speed achieving 222.16 F/g at a 1.0 mV/s. The observed definite plateaus in the charging/discharging profile confirms the battery-like behavior of Ni-Co-P prepared material. Its pseudocapacitive charge storage mechanism was analyzed based on the power law (I(v) = a υ^b). Ni-Co-P showed an excellent rate performance, where its coulombic efficiency (η%) increases with the applied current density reaching 174.5% at 10 A/g. Besides, Ni-Co-P exhibited an outstanding long-term cyclability with enhanced capacitance retention stabilized at around 105% over 1000 cycles at 50 mV/s. This was further evinced from the observed significant decrease in the electrode total resistance after cycling. The study points to the viability of EE method for the successful low-cost synthesis of efficient charge storage materials with excellent stability for high-performance supercapacitor applications.

寻找方便的低成本方法来制备用于高性能超级电容器的有前途的电荷存储材料始终是一个严峻的挑战。在本文中，采用了简单的生态友好型化学电解（EE）技术将蠕虫状的Ni-Co-P纳米膜直接沉积在泡沫镍（NF）衬底上。通过SEM，EDS和XRD技术证实了所制备的活性材料的总体形态和微观结构。通过循环伏安法（CV），恒电流充放电（GCD）和电化学阻抗谱（EIS）研究了Ni-Co-P / NF电极在6.0 M KOH溶液中的超电容性能。CV曲线显示一对两个宽电流峰（I _p）与制造的Ni-Co-P中的可逆氧化还原反应有关。线性关系I _p与υ1 ^/2的高斜率值表明，由于Ni-Co-P活性材料的多孔质构，容易获得扩散路径。随着扫描速度的降低，其比电容在1.0 mV / s时达到222.16 F / g。在充电/放电曲线中观察到的确定的平稳状态证实了Ni-Co-P制备材料的电池状行为。基于电力法（分析其伪电容电荷存储机制，我（V）= 一υ ^b）。Ni-Co-P表现出优异的速率性能，其库仑效率（η％）随10 A / g的施加电流密度达到174.5％而增加。此外，Ni-Co-P具有出色的长期循环能力，在50 mV / s的1000次循环中，电容保持率提高了约105％。从观察到的循环后电极总电阻的显着下降进一步证明了这一点。这项研究指出了EE方法在成功低成本合成高效电荷存储材料方面的可行性，该材料对于高性能超级电容器应用具有出色的稳定性。