For manufacturing high-performance asymmetric supercapacitors (ASCs), it is important to synthesize cathode and anode materials with excellent performance and respective stable electrochemical window to match with each other. In this work, by one-step electrodeposition and hydrothermal processes, ultra-thin multilayer amorphous Mn(OH)₂ nanosheets and porous Fe₂O₃ nanoparticles supported on activated carbon cloth (AC) as cathode and anode are synthesized, respectively. The Mn(OH)₂@AC cathode shows maximum specific capacitance of 3103 mF cm⁻² at (0–1) V due to unique amorphous network structure, while the Fe₂O₃@AC anode exhibits maximum specific capacitance of 1472 mF cm⁻² at (-1-0) V owing to large specific surface area of its porous structure. To obtain high performance ASC by matching the properties of Mn(OH)₂@AC cathode and Fe₂O₃@AC anode, contributions of diffusion and capacitive controls, and comparisons of respective areal capacitances are investigated at different scan rates. The Mn(OH)₂//Fe₂O₃ ASC device achieves 2 V voltage in 1 M LiNO₃ aqueous electrolyte, high energy density of 5.125 mWh cm⁻³ at a power density of 14.239 mW cm⁻³, and maintaining 97.1% after 8000 cycles. For the simple synthesis and excellent electrochemical performance, these Fe₂O₃ anode and Mn(OH)₂ cathode can be used as promising electrodes for energy storage devices.

对于制造高性能不对称超级电容器（ASC），重要的是合成具有优异性能和彼此匹配的稳定电化学窗口的阴极和阳极材料。在这项工作中，通过一步电沉积和水热工艺，分别合成了超薄多层非晶Mn（OH）₂纳米片和负载在活性炭布（AC）上作为阴极和阳极的多孔Fe ₂ O ₃纳米粒子。Mn（OH）₂ @AC阴极由于独特的非晶网络结构而在（0-1）V时显示出3103 mF cm ^-2的最大比电容，而Fe ₂ O ₃由于其多孔结构的大比表面积，@ AC阳极在（-1-0）V时显示出最大比电容为1472 mF cm ^-2。为了通过匹配Mn（OH）₂ AC阴极和Fe ₂ O ₃ AC阳极的性能来获得高性能的ASC ，研究了扩散和电容控制的贡献以及在不同扫描速率下各个面电容的比较。Mn（OH）₂ // Fe ₂ O ₃ ASC装置在1 M LiNO ₃水性电解质中达到2 V电压，在 14.239 mW cm ^-3的功率密度下具有5.125 mWh cm ^-3的高能量密度，并在8000个周期后保持97.1％。为了简单的合成和出色的电化学性能，这些Fe ₂ O ₃阳极和Mn（OH）₂阴极可用作储能器件的有希望的电极。