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首页> 外文期刊>Advanced energy materials >Atomic Sn~(4+) Decorated into Vanadium Carbide MXene Interlayers for Superior Lithium Storage
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Atomic Sn~(4+) Decorated into Vanadium Carbide MXene Interlayers for Superior Lithium Storage

机译：原子Sn〜（4+）装饰到碳化钒MXene中间层中以实现优异的锂存储

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摘要

Ion intercalation is an important way to improve the energy storage performance of 2D materials. The dynamic energy storage process in such layered intercalations is important but still a challenge mainly due to the lack of effective operando methods. Herein, a unique atomic Sn4+-decorated vanadium carbide (V2C) MXene not only exhibiting highly enhanced lithium-ion battery (LIB) performance, but also possessing outstanding rate and cyclic stability because of the expanded interlayer space and the formation of V Symbol of the Klingon Empire O Symbol of the Klingon Empire Sn bonding is demonstrated. In combination with ex situ tests, an operando X-ray absorption fine structure measurement is developed to explore the dynamic mechanism of V2C@Sn MXene electrodes in LIBs. The results clearly reveal the valence changes of vanadium (V), tin (Sn), and positive contribution of oxygen (O) atoms during the charging/discharging process, confirming their contribution for lithium storage capacity. The stability of intercalated MXene electrode is further in situ studied to prove the key role of V Symbol of the Klingon Empire O Symbol of the Klingon Empire Sn bonding.
机译：离子嵌入是提高2D材料能量存储性能的重要方法。在这种分层插层中的动态能量存储过程很重要，但仍然是一个挑战，主要是由于缺乏有效的操作方法。本文中，一种独特的Sn4 +修饰的碳化钒（V2C）MXene原子不仅表现出高度增强的锂离子电池（LIB）性能，而且由于层间空间的扩大和V符号的形成而具有出色的速率和循环稳定性。克林贡帝国O展示了克林贡帝国锡键的符号。结合异位测试，开发了可操作的X射线吸收精细结构测量方法，以探索LIB中V2C @ Sn MXene电极的动力学机理。结果清楚地表明了在充电/放电过程中钒（V），锡（Sn）的价态变化以及氧（O）原子的正贡献，证实了它们对锂存储容量的贡献。对嵌入MXene电极的稳定性进行了进一步的原位研究，以证明克林贡帝国的V符号和克林贡帝国锡键的O符号的关键作用。

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  • 来源
    《Advanced energy materials》 |2019年第4期|1802977.1-1802977.7|共7页
  • 作者

    Wang Changda; Chen Shuangming; Xie Hui; Wei Shiqiang; Wu Chuanqiang; Song Li;

  • 作者单位

    Univ Sci & Technol China, CAS Ctr Excellence Nanosci, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China;

    Univ Sci & Technol China, CAS Ctr Excellence Nanosci, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China;

    Univ Sci & Technol China, CAS Ctr Excellence Nanosci, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China;

    Univ Sci & Technol China, CAS Ctr Excellence Nanosci, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China;

    Univ Sci & Technol China, CAS Ctr Excellence Nanosci, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China;

    Univ Sci & Technol China, CAS Ctr Excellence Nanosci, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    atomic ion intercalation; ex situ study; layered materials; Li-ion storage; operando spectroscopic study;

    机译：原子离子插层异位研究层状材料锂离子存储操作光谱研究;

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