Persulfurated Coronene: A New Generation of "Sulflower"
Persulfurated Coronene: A New Generation of "Sulflower"
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DOI：
10.1021/jacs.6b12630
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发表时间：
2017-02-15
影响因子：
15
通讯作者：
Feng, Xinliang
中科院分区：
文献类型：
--
作者：
Dong, Renhao;Pfeffermann, Martin;Feng, Xinliang
我们报告了首次合成的过硫化多环芳烃（PAH）作为下一代“葵花”。在这种新型 PAH 中，二硫化物单元在晕苯核心周围形成全硫外围。通过微观、光谱和电化学方法研究了结构、电子性质和氧化还原行为，并得到密度泛函理论的支持。过硫化晕苯的富硫特性使其成为一种很有前途的锂硫电池正极材料，在0.6 C下循环120次后显示出520 mAh g(-1)的高容量，且容量保持率高达90%。
We report the first synthesis of a persulfurated polycyclic aromatic hydrocarbon (PAH) as a next generation "sulflower." In this novel PAH, disulfide units establish an all-sulfur periphery around a coronene core. The structure, electronic properties, and redox behavior were investigated by microscopic, spectroscopic and electrochemical methods and supported by density functional theory. The sulfur-rich character of persulfurated coronene renders it a promising cathode material for lithium sulfur batteries, displaying a high capacity of 520 mAh g(-1) after 120 cycles at 0.6 C with a high-capacity retention of 90%.