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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Facile synthesis of well-ordered manganese oxide nanosheet arrays on carbon cloth for high-performance supercapacitors
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Facile synthesis of well-ordered manganese oxide nanosheet arrays on carbon cloth for high-performance supercapacitors

机译：在高性能超级电容器的碳布上轻松合成有序的氧化锰纳米片阵列

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摘要

Well-ordered manganese oxide (MnO2) nanosheet arrays (NSAs) were grown directly on carbon cloth via a simple in situ redox replacement reaction between potassium permanganate (KMn04) and carbon cloth without any other oxidant or reductant addition. The morphology of MnO2 NSAs was examined by scanning and transmission electron microscopy and the phase structure of nanosheets (NSs) was analyzed by X-ray diffraction spectroscopy. Based on a series of time-dependent experiments, a possible growth process for this structure was proposed. The MnO2 NSAs supported on carbon cloth were directly used as integrated electrodes for electrochemical capacitors. The ordered MnO2 NSAs yielded high-capacitance performance with a high specific capacitance of 2.16 F cm~(-2) at a charge and discharge current density of 5 mA cm~(-2) and 1.01 F cm~(-2) at 20 mA cm~(-2) with a cycling ability (61.4% of the initial specific capacitance remains after 3000 cycles). The MnO2 nanosheet arrays with large surface area and high degree of ordering, combined with the flexible carbon cloth substrate can offer great promise for large-scale supercapacitor applications.
机译：通过高锰酸钾（KMnO4）和碳布之间的简单原位氧化还原置换反应，在不添加任何其他氧化剂或还原剂的情况下，将有序的氧化锰（MnO2）纳米片阵列（NSA）直接在碳布上生长。通过扫描和透射电子显微镜检查了MnO2 NSA的形态，并通过X射线衍射光谱分析了纳米片（NSs）的相结构。基于一系列随时间变化的实验，提出了该结构的可能生长过程。碳布上负载的MnO2 NSA直接用作电化学电容器的集成电极。有序的MnO2 NSA产生高电容性能，在5 mA cm〜（-2）的充放电电流密度和20°C下的1.01 F cm〜（-2）的充放电电流下具有2.16 F cm〜（-2）的高比电容。具有循环能力的mA cm〜（-2）（3000次循环后仍保留初始比电容的61.4％）。具有大表面积和高度有序度的MnO2纳米片阵列与柔性碳布基底相结合，可为大规模超级电容器应用提供广阔前景。

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