Vashisth Priyanka, Sharma Aditya, Nasit Manas, Singh Jitendra Pal, Varshney Mayora, Kumar Shalendra, Won S O, Shin H J
Department of Sciences (Physics), Manav Rachna University, Faridabad, Haryana, 121004, India.
Department of Physics, University of Petroleum and Energy Studies (UPES), Dehradun, Uttarakhand, 248007, India.
Heliyon. 2024 Jul 26;10(15):e35360. doi: 10.1016/j.heliyon.2024.e35360. eCollection 2024 Aug 15.
α-NaMnO@NaMnO () and KMnO@NaMnO () nanocomposites have been synthesized using solid-state reaction method. FESEM results convey the formation of column-shaped morphology. FTIR exhibited a shift in the vibration frequency upon potassium loading. Cyclic voltammetric curves are scanned (0 V-0.8 V) at different scan rates (5 mV/s to 100 mV/s) in 1M KOH electrolyte. Galvanostatic charge-discharge characteristics, for different current densities, have shown non-linear or pseudocapacitive characteristics of the prepared electrodes. High specific capacitance of ∼361 F/g and ∼143 F/g, at a current density of 1A/g, has been achieved for and samples, respectively. sample exhibited higher capacitive retention (116 %), up to 2000 cycles, and obeys lower series resistance, charge transfer resistance, and Warburg impedance parameters, thus, convey higher efficiency of this compound for supercapacitor applications.
采用固态反应法合成了α-NaMnO@NaMnO（）和KMnO@NaMnO（）纳米复合材料。场发射扫描电子显微镜（FESEM）结果表明形成了柱状形态。傅里叶变换红外光谱（FTIR）显示钾负载后振动频率发生了变化。在1M氢氧化钾（KOH）电解液中，以不同扫描速率（5mV/s至100mV/s）扫描循环伏安曲线（0V - 0.8V）。对于不同电流密度，恒电流充放电特性显示了所制备电极的非线性或赝电容特性。在电流密度为1A/g时， 样品和 样品分别实现了约361F/g和约143F/g的高比电容。 样品在高达2000次循环时表现出更高的电容保持率（116%），并且具有更低的串联电阻、电荷转移电阻和瓦尔堡阻抗参数，因此，表明该化合物在超级电容器应用中具有更高的效率。
