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Preparation and Reactions of Sulfides

Preparation and Reactions of Sulfides

Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.

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Updated: Jun 16, 2025

Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material

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Published on: February 5, 2019

用于有效的Li-S电池分离器的硫酸功能化Graphdiyne

Yang Kong¹, Xuming Qiu², Yurui Xue¹

¹Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, Science Center for Material Creation and Energy Conversion, Institute of Frontier Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Qingdao 266237, P.R. China.

Journal of the American Chemical Society

|August 16, 2024

概括

一种新型的SO3H功能化石墨 (SOGDY) 分离器有效抑制-硫 (Li-S) 电池中的树突和聚硫化物穿. 这一进步使得即使在低温下,Li-S能储存具有稳定性和高性能.

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科学领域:

材料科学
电化学
能量储存

背景情况:

-硫 (Li-S) 电池具有高能量密度,但受到树脂增长和聚硫化物 (LiPS) 穿的影响.
现有的分离器往往无法充分解决这些关键问题,限制了实际应用.

研究的目的:

开发一种改进的Li-S电池分离器,以提高稳定性和性能.
研究SO3H功能化石墨 (SOGDY) 在缓解树突形成和LiPSs转移方面的有效性.

主要方法:

将硫酸组 (SO3H) 移植到石墨丁 (GDY) 上以产生SOGDY.
在Li-S电池配置中使用SOGDY作为分离器.
在各种温度和速率下进行电化学测试,包括对称电池循环和Li-S电池性能评估.

主要成果:

SOGDY保持了石墨烯的全碳网络和均的纳米孔,促进了快速的Li+运输甚至沉积.
SO3H组有效地抑制LiPS通过空间阻塞和极性吸附.
SOGDY分离器在酸对称电池中表现出超过3500小时的特殊稳定性,在酸电池中表现出极好的低温,高速性能.

结论:

SOGDY是高级Li-S电池的高效分离材料.
结合功能化纳米孔的稳定全碳网络的策略是改进Li-S电池技术的一个有希望的方法.