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相关概念视频

Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

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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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Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Preparation and Reactions of Thiols02:33

Preparation and Reactions of Thiols

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Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
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Sulfonation of benzene is a reaction wherein benzene is treated with fuming sulfuric acid at room temperature to produce benzenesulfonic acid. Fuming sulfuric acid is a mixture of sulfur trioxide and concentrated sulfuric acid.
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Synthesis of Terpolymers at Mild Temperatures Using Dynamic Sulfur Bonds in PolyS-Divinylbenzene
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对于硫电池的多硫化物并列转换.

Zhilong Wang1, Jianxiong Gao1, Shimeng Zhang1

  • 1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)
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概括

一种与和站点的新型双联电催化剂有效地将多硫化物转化为硫电池. 这一策略增强了中间反应,提高了电池容量和循环寿命.

关键词:
双重活动场所 双重活动场所硫电池的电池是一种电池.聚硫化物聚硫化物双联催化剂是一种催化剂.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 电化学 电化学 电化学
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 聚硫化物的电催化转化对于硫电池至关重要.
  • 在将硫减少复杂性与合适的催化剂相匹配方面存在挑战.

研究的目的:

  • 开发一个协同转换策略,以促进多硫化物中间反应.
  • 为硫电池设计一个具有和位的双功能电催化剂.

主要方法:

  • 制造一个和 (Co/Zn) 电催化剂.
  • 对聚硫化物转换的双联催化机制的研究.
  • 硫电池的电化学性能测试.

主要成果:

  • Co/Zn催化剂促进了S8转化为Li2S4 (通过Zn位点),并随后减少Li2S4 (通过Co位点).
  • 实现了高的初始放电容量 (在0.1°C时达到1347.5mAh-1g).
  • 证明了出色的速率性能 (796.8 mAh g-1 在3 C) 和周期稳定性 (每周期0.086%的衰变在3.0 C).

结论:

  • 双联催化方法有效地增强了多步聚硫化物转化.
  • 催化场的协调设计对于优化电池中复杂的电化学反应至关重要.
  • 该战略为开发用于高性能硫电池的先进电催化剂提供了洞察力.