The performance of electrochemical supercapacitors is greatly affected by electrodes, which are considered to be one of the most significant components. This article gives light on manganese dioxide (MnO2) incorporated poly(methyl methacrylate) (PMMA) membranes as electrodes for supercapacitor applications. Interaction between MnO2 and PMMA is justified by Fourier transform infrared spectroscopy. The surface morphology of MnO2@PMMA membranes was observed from scanning electron microscopy technique and atomic force microscopy. The techniques such as cyclic voltammetry and electrochemical impedance spectroscopy indicated that 7.5 wt% MnO2@PMMA membrane exhibited the highest electrochemical performance. GCD tests revealed that it 7.5 wt% MnO2@PMMA membrane showed a maximum specific capacitance of 361 F g−1 at a current density of 125 mA g−1 along with a maximum energy density of 144 Wh kg−1 and maximum power density of 1135 W kg−1. The membrane displayed 87 % capacitance retention after 5000 cycles. Fabricated interdigital micro supercapacitor device revealed the highest specific capacitance of 528 mF g−1 at a current density of 0.15 mA g−1 along with a maximum energy density of 47 mWh kg−1 and maximum power density of 400 mW kg−1.

中文翻译：

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阐明超级电容器用聚（甲基丙烯酸甲酯）包覆二氧化锰膜的电化学性能


电化学超级电容器的性能很大程度上受电极影响，电极被认为是最重要的部件之一。本文介绍了二氧化锰 (MnO2) 掺入聚甲基丙烯酸甲酯 (PMMA) 膜作为超级电容器应用电极的情况。傅里叶变换红外光谱证实了 MnO2 和 PMMA 之间的相互作用。通过扫描电子显微镜技术和原子力显微镜观察MnO2@PMMA膜的表面形貌。循环伏安法和电化学阻抗谱等技术表明7.5 wt% MnO2@PMMA膜表现出最高的电化学性能。 GCD 测试表明，7.5 wt% MnO2@PMMA 膜在 125 mA g−1 的电流密度下表现出 361 F g−1 的最大比电容，以及 144 Wh kg−1 的最大能量密度和 144 Wh kg−1 的最大功率密度。 1135 瓦千克−1。 5000 次循环后，该膜显示出 87% 的电容保持率。制造的叉指微型超级电容器装置在0.15 mA g−1 的电流密度下显示出528 mF g−1 的最高比电容，以及47 mWh kg−1 的最大能量密度和400 mW kg−1 的最大功率密度。