![1,4-Piperazinediylbis{[6-(1H-benzimidazol-2-yl)-2-pyridinyl]methanone} structure](https://cnstatic.chemtradehub.com/structs/191/1912399-75-7-b9f0.webp "1,4-Piperazinediylbis{[6-(1H-benzimidazol-2-yl)-2-pyridinyl]methanone} structure")
1,4-Piperazinediylbis{[6-(1H-benzimidazol-2-yl)-2-pyridinyl]methanone}
CAS号:
1912399-75-7
分子式:
C30H24N8O2
A three-dimensional interconnected nitrogen-doped graphene-like porous carbon-modified separator for high-performance Li–S batteries
文献信息
发布日期
2020-06-09
DOI
10.1039/D0SE00620C
影响因子
6.367
作者
Wen Huang, Daqian Ruan, Hui Chen, Kai Hu, Juan Wen, Wenqi Yan, Yusong Zhu, Yi Zhang, Nengfei Yu
查看原文
摘要
Suppressing rapid capacity decay caused by the shuttle effect of dissolved lithium polysulfides between two electrodes is crucial to the realization of a practical lithium–sulfur (Li–S) batteries. Herein, the shuttle effect of polysulfides was efficiently inhibited by using a lightweight and thin functional separator in the form of coating three-dimensional interconnected nitrogen-doped graphene-like porous carbon nanosheets on one surface of a commercial polypropylene separator. This structure for a thin functional separator heightens the reversible capacity and cycle performance by doping nitrogen to chemically bond with polysulfides and the porous carbon layer to physically block polysulfides. As a result, the Li–S batteries based on the functional separators deliver an initial capacity of 1169.0 mA h g−1 at current rate of 1C and a substantial capacity of 845.3 mA h g−1 after 500 cycles, corresponding to a low capacity decay of only 0.055% per cycle. Even at a high rate of 3C, the batteries can still deliver a high reversible capacity of 743.6 mA h g−1 with good cycle performance.
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