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Exceptional interfacial electrochemistry of few-layered 2D MoS2 quantum sheets for high performance flexible solid-state supercapacitors
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-06-01 , DOI: 10.1039/d0ta01156h Swapnil Shital Nardekar 1, 2, 3, 4, 5 , Karthikeyan Krishnamoorthy 1, 2, 3, 4, 5 , Parthiban Pazhamalai 1, 2, 3, 4, 5 , Surjit Sahoo 1, 2, 3, 4, 5 , Vimal Kumar Mariappan 1, 2, 3, 4, 5 , Sang-Jae Kim 1, 2, 3, 4, 5
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-06-01 , DOI: 10.1039/d0ta01156h Swapnil Shital Nardekar 1, 2, 3, 4, 5 , Karthikeyan Krishnamoorthy 1, 2, 3, 4, 5 , Parthiban Pazhamalai 1, 2, 3, 4, 5 , Surjit Sahoo 1, 2, 3, 4, 5 , Vimal Kumar Mariappan 1, 2, 3, 4, 5 , Sang-Jae Kim 1, 2, 3, 4, 5
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Molybdenum disulfide (MoS2) is one of the promising electrochemical energy storage materials among the recently explored 2D materials beyond the extensively studied graphene sheets. However, MoS2 in the form of quantum sheets (QSs) has not yet been examined for use in energy storage devices (batteries and supercapacitors). Here, we demonstrate the superior electrochemical charge-storage properties of exfoliated MoS2 QSs (with lateral size in the range of 5 to 10 nm) for the first time. A salt-assisted ball milling process was used to prepare MoS2 QSs in gram scale that leads to size confinement in both lateral and vertical orientations. The electrochemical analysis of MoS2 QSs indicated their superior capacitive properties compared to the bulk MoS2, which originates from the combination of quantum capacitance and electrochemical capacitance. The device specific properties of MoS2 QSs were studied by constructing a flexible symmetric supercapacitor (SSC) that demonstrated a high device capacitance (162 F g−1), energy density (14.4 Wh kg−1), good rate capability, and long cycle life. The energy storage performance metrics of MoS2 QSs based SSC device were superior compared to the state-of-art MoS2 based supercapacitors. Furthermore, a solar-driven wireless charging power system comprising the fabricated MoS2 QSs-based SSC as an energy storage device is illustrated in the view of expanding its utility towards practical applications.
中文翻译：
高性能柔性固态超级电容器的几层2D MoS2量子片的出色界面电化学
二硫化钼（MoS 2）是一种经过广泛研究的石墨烯片材，是最近探索的2D材料中有希望的电化学储能材料之一。但是，尚未检查以量子片（QSs）形式的MoS 2用于能量存储设备（电池和超级电容器）的情况。在这里，我们首次展示了脱落的MoS 2 QS（横向尺寸在5到10 nm范围内）的优异的电化学电荷存储性能。盐辅助球磨工艺用于制备以克为单位的MoS 2 QS，从而导致横向和垂直方向的尺寸限制。MoS 2的电化学分析与整体MoS 2相比，QSs显示出其优越的电容特性，这是由量子电容和电化学电容的组合产生的。通过构建具有高装置电容（162 F g -1），能量密度（14.4 Wh kg -1），良好的倍率能力和长周期的柔性对称超级电容器（SSC），研究了MoS 2 QSs的装置特定性能。生活。基于MoS 2 QSs的SSC器件的储能性能指标优于基于MoS 2的最新超级电容器。此外，包括制造的MoS 2的太阳能驱动的无线充电电源系统 为了将其实用性扩展到实际应用，说明了基于QSs的SSC作为储能设备。
更新日期：2020-07-07
中文翻译：
高性能柔性固态超级电容器的几层2D MoS2量子片的出色界面电化学
二硫化钼（MoS 2）是一种经过广泛研究的石墨烯片材，是最近探索的2D材料中有希望的电化学储能材料之一。但是，尚未检查以量子片（QSs）形式的MoS 2用于能量存储设备（电池和超级电容器）的情况。在这里，我们首次展示了脱落的MoS 2 QS（横向尺寸在5到10 nm范围内）的优异的电化学电荷存储性能。盐辅助球磨工艺用于制备以克为单位的MoS 2 QS，从而导致横向和垂直方向的尺寸限制。MoS 2的电化学分析与整体MoS 2相比，QSs显示出其优越的电容特性，这是由量子电容和电化学电容的组合产生的。通过构建具有高装置电容（162 F g -1），能量密度（14.4 Wh kg -1），良好的倍率能力和长周期的柔性对称超级电容器（SSC），研究了MoS 2 QSs的装置特定性能。生活。基于MoS 2 QSs的SSC器件的储能性能指标优于基于MoS 2的最新超级电容器。此外，包括制造的MoS 2的太阳能驱动的无线充电电源系统 为了将其实用性扩展到实际应用，说明了基于QSs的SSC作为储能设备。
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