Sulfur-rich Graphdiyne-Containing Electrochemical Active Tetrathiafulvalene for Highly Efficient Lithium Storage Application
Sulfur-rich Graphdiyne-Containing Electrochemical Active Tetrathiafulvalene for Highly Efficient Lithium Storage Application
复制标题
用于高效锂存储应用的富硫含石墨炔电化学活性四硫富瓦烯
DOI：
10.1021/acsami.9b15133
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发表时间：
2019-12-11
影响因子：
9.5
通讯作者：
Zhao, Yingjie
中科院分区：
文献类型：
--
作者：
Pan, Qingyan;Chen, Siqi;Zhao, Yingjie
在温和的条件下，在液/液界面合成了一种含四硫富瓦烯电化学活性单元的富硫石墨二炔（TTF-GDY）材料。扩展的二维（2D）Pr-共轭骨架包含大的面内空腔以容纳限定的硫元素和精确的硫含量。透射电子显微镜（TEM）、扫描电子显微镜（SEM）和原子力显微镜（AFM）表征表明TTF-GDY采用层状结构。X射线光电子能谱（XPS）、拉曼光谱、选区电子衍射（SAED）、晶体建模和基于分子力学的计算进一步证实了所提出的骨架结构和预期的化学组成。考虑到其独特的结构和富硫特性，我们将其作为锂电池的电极应用。由于独特的二维骨架结构，TTF-GDY表现出837.6 mAh/g的高比容量，特别是在高电流密度下具有稳健的长期稳定性。这些结果表明，这种富硫TTF-GDY作为一种新型的电化学材料，在能源领域具有巨大的应用潜力。
A sulfur-rich graphdiyne (TTF-GDY) material containing electrochemically active unit of tetrathiafulvalene was successfully synthesized at the liquid/liquid interface under mild conditions. The extended two-dimensional (2D) pr-conjugated framework contains large in-plane cavities to accommodate defined sulfur elements and precise sulfur content. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), and atomic force microscopy (AFM) characterizations demonstrated that the TTF-GDY adopted the layered structures. X-ray photoelectron spectroscopy (XPS), Raman spectrum, selected area electron diffraction (SAED), crystal modeling, and molecular-mechanics -based calculation further confirmed the proposed framework structure and the expected chemical compositions. Considering the unique structure and sulfur-rich characteristic, we then applied this material as an electrode in lithium battery applications. Due to the unique 2D framework structure, the TTF-GDY exhibited a high specific capacity of 837.6 mAh/g, particularly having a robust long-term stability under the high current density. These results demonstrated that such a sulfur-rich TTF-GDY, as a novel electrochemical material would have great application potential in energy fields.