In recent days, energy storage devices like supercapacitors are gaining increasing interest. However, the real challenge of getting high specific capacitance with significant mechanical stability and high energy density at an affordable cost for the supercapacitors based on mixed transition metal oxides continues. Herein, mesoporous NiMnO₃ (NMO) nanostructures have been prepared by the hydrothermal method. Electrochemical performance of the NMONickel foam (NF) electrode is investigated by cyclic voltammetry at various scan rates of 5–100 mVs⁻¹, galvanostatic charge-discharge at various current densities of 3–5 mAcm⁻², and electrochemical impedance spectroscopy over a frequency range of 100 Hz to 100 kHz in 1 M KOH, 1 M NaOH, and 1 M Na₂SO₄ electrolytes. The NMONF working electrode displayed a high specific capacitance of 435 Fg⁻¹ at a scan rate of 5 mVs⁻¹ and 100% cyclic stability for 2000 cycles, in 1 M KOH electrolyte. The determined values of specific energy, specific power, and coulombic efficiency for NMO- NF electrodes are 11.13 Whkg⁻¹, 198.52 Wkg⁻¹, and 98.1%, respectively.

近年来，诸如超级电容器之类的能量存储设备越来越受到关注。然而，对于基于混合过渡金属氧化物的超级电容器，以可承受的成本获得具有显着机械稳定性和高能量密度的高比电容的实际挑战仍然存在。在此，通过水热法制备了介孔NiMnO ₃（NMO）纳米结构。NMO泡沫镍（NF）电极的电化学性能通过循环伏安法在5–100 mVs ^-1的各种扫描速率下，在3–5 mAcm ^-2的各种电流密度下的恒电流充放电和电化学阻抗谱研究。 1 M KOH，1 M NaOH和1 M Na中100 Hz至100 kHz的频率范围₂ SO ₄电解质。在1 M KOH电解质中，NMO NF工作电极在5 mVs ^-1的扫描速率下具有435 Fg ^-1的高比电容，在2000次循环中具有100％的循环稳定性。比能量，比功率，和库仑效率的对NMO-NF电极所确定的值是11.13 Whkg ^-1，198.52 WKG ^-1，和98.1％之间。