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首页> 外文期刊>Advanced energy materials >The Charge Storage Mechanisms of 2D Cation-Intercalated Manganese Oxide in Different Electrolytes
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The Charge Storage Mechanisms of 2D Cation-Intercalated Manganese Oxide in Different Electrolytes

机译：2D阳离子插入锰氧化物在不同电解质中的电荷储存机制

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摘要

2D ion-intercalated metal oxides are emerging promising new electrodes for supercapacitors because of their unique layered structure as well as distinctive electronic properties. To facilitate their application, fundamental study of the charge storage mechanism is required. Herein, it is demonstrated that the application of in situ Raman spectroscopy and electrochemical quartz crystal microbalance with dissipation monitoring (EQCM-D), provides a sufficient basis to elucidate the charge storage mechanism in a typical 2D cation-intercalated manganese oxide (Na0.55Mn2O4 center dot 1.5H(2)O, abbreviated as NMO) in neutral and alkaline aqueous electrolytes. The results reveal that in neutral Na2SO4 electrolytes, NMO mainly displays a surface-controlled pseudocapacitive behavior in the low potential region (0-0.8 V), but when the potential is higher than 0.8 V, an intercalation pseudocapacitive behavior becomes dominant. By contrast, NMO shows a battery-like behavior associated with OH- ions in alkaline NaOH electrolyte. This study verifies that the charge storage mechanism of NMO strongly depends on the type of electrolyte, and even in the same electrolyte, different charging behaviors are revealed in different potential ranges which should be carefully taken into account when optimizing the use of the electrode materials in practical energy-storage devices.
机译：2D离子插入的金属氧化物是由于其独特的层状结构以及独特的电子特性，因此为超级电容器提供了对超级电容器的新电极。为促进其应用，需要对电荷存储机制的基本研究。在此，证明使用耗散监测（EQCM-D）的原位拉曼光谱和电化学石英晶体微稳定的应用提供了足够的基础，以阐明典型的2D阳离子插层氧化锰（Na0.55mn2O4）中的电荷储存机制中性和碱性电解质中的中心点1.5H（2）o，缩写为NMO）。结果表明，在中性Na2SO4电解质中，NMO主要显示在低电位区域（0-0.8V）中的表面控制的假偶联行为，但是当电位高于0.8V时，插入伪容量行为变得优势。相比之下，NMO显示出与碱性NaOH电解质中的OH-离子相关的电池状行为。本研究验证了NMO的电荷储存机制强烈取决于电解质的类型，即使在相同的电解质中，在优化电极材料的使用时应仔细考虑不同的充电行为。在优化电极材料时应仔细考虑不同的电解。实用储能设备。

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  • 来源
    《Advanced energy materials》 |2019年第3期|1802707.1-1802707.10|共10页
  • 作者

    Zhang Qingnuan; Levi Mikhael D.; Dou Qingyun; Lu Yulan; Chai Yinguang; Lei Shulai; Ji Hengxing; Liu Bao; Bu Xudong; Ma Pengjun; Yan Xingbin;

  • 作者单位

    Chinese Acad Sci Lanzhou Inst Chem Phys Lab Clean Energy Chem & Mat State Key Lab Solid Lubricat Lanzhou 730000 Gansu Peoples R China;

    Bar Ilan Univ Dept Chem IL-52900 Ramat Gan Israel;

    Chinese Acad Sci Lanzhou Inst Chem Phys Lab Clean Energy Chem & Mat State Key Lab Solid Lubricat Lanzhou 730000 Gansu Peoples R China|Univ Chinese Acad Sci Ctr Mat Sci & Opoelect Engn Beijing 100080 Peoples R China;

    Lanzhou Univ Sch Phys Sci & Technol Lanzhou 730000 Gansu Peoples R China;

    Univ Sci & Technol China Dept Mat Sci & Engn Hefei 230026 Anhui Peoples R China;

    Chinese Acad Sci Lanzhou Inst Chem Phys Lab Clean Energy Chem & Mat State Key Lab Solid Lubricat Lanzhou 730000 Gansu Peoples R China;

    Univ Sci & Technol China Dept Mat Sci & Engn Hefei 230026 Anhui Peoples R China;

    Chinese Acad Sci Lanzhou Inst Chem Phys Lab Clean Energy Chem & Mat State Key Lab Solid Lubricat Lanzhou 730000 Gansu Peoples R China|Univ Chinese Acad Sci Ctr Mat Sci & Opoelect Engn Beijing 100080 Peoples R China;

    Lanzhou Univ Technol Sch Mat Sci & Engn Lanzhou 730050 Gansu Peoples R China;

    Chinese Acad Sci Lanzhou Inst Chem Phys Lab Clean Energy Chem & Mat State Key Lab Solid Lubricat Lanzhou 730000 Gansu Peoples R China;

    Chinese Acad Sci Lanzhou Inst Chem Phys Lab Clean Energy Chem & Mat State Key Lab Solid Lubricat Lanzhou 730000 Gansu Peoples R China|Chinese Acad Sci Dalian Inst Chem Phys Dalian Natl Lab Clean Energy Dalian 116000 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    cation-intercalated manganese oxide; charge storage mechanism; electrochemical quartz crystal microbalance; operando Raman; supercapacitors;

    机译：阳离子插入的锰氧化物;电荷储存机构;电化学石英晶体微稳定;Operando拉曼;超级电容器;

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