The various advantages and special characteristics of the polymorphism and good structural flexibility of manganese dioxide make it a valuable electrode material in the field of energy storage devices. In this study, hollow carbon nanofiber-manganese dioxide nanocomposites were prepared via a simple two-step process. The prepared electrode materials were characterized by spectroscopic and microscopic techniques, and the electrochemical supercapacitive performance was analyzed in a three-electrode assembly cell using galvanostatic charge-discharge and cyclic voltammetry measurements. Amon all the prepared electrodes (H-CNfs, MnO₂-H-CNfs-1, MnO₂-H-CNfs-3 and MnO₂-H-CNfs-5), the optimized MnO₂-H-CNfs-3 electrode displays a high specific capacitance of 464 Fg^-1 and excellent long-term cycling performance with a capacitance retention of 92.3% over 4500 cycles. The enhanced performance of the developed electrode was attributed to the synergistic effect due to the presence of the carbon nanofiber that provides sufficient conductivity and provides a large surface area for the electrode-electrolyte reactions, whereas MnO₂ provides excellent redox behavior during the charge-discharge reactions. The developed electrode and its performance can play an important role in the development of highly efficient energy storage electrode materials.

二氧化锰的多晶型和良好的结构柔韧性的各种优点和特殊特性使其成为储能器件领域中有价值的电极材料。在这项研究中，通过简单的两步法制备了中空碳纳米纤维-二氧化锰纳米复合材料。通过光谱和显微技术对制备的电极材料进行表征，并使用恒电流充放电和循环伏安法测量在三电极组装电池中分析电化学超级电容性能。在所有制备的电极（H-CNfs、MnO ₂ -H-CNfs-1、MnO ₂ -H-CNfs-3 和 MnO ₂ -H-CNfs-5）中，优化后的 MnO ₂-H-CNfs-3 电极显示出 464 Fg ^-1的高比电容和出色的长期循环性能，4500 次循环后电容保持率为 92.3%。由于碳纳米纤维的存在提供了足够的导电性并为电极 - 电解质反应提供了大的表面积，因此所开发电极的性能增强归因于协同效应，而 MnO ₂在充放电过程中提供了优异的氧化还原行为反应。所开发的电极及其性能对开发高效储能电极材料具有重要意义。