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相关概念视频

Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

4.8K
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.
4.8K
Colloidal precipitates01:09

Colloidal precipitates

576
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
576
Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

1.8K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.8K
Preparation and Reactions of Thiols02:33

Preparation and Reactions of Thiols

6.2K
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.
6.2K
Formation of Complex Ions03:45

Formation of Complex Ions

23.6K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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Updated: Jul 1, 2025

Synthesis of Terpolymers at Mild Temperatures Using Dynamic Sulfur Bonds in PolyS-Divinylbenzene
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通过隔离器涂层减轻聚硫化物航天器机制.

Sebastian Daniel Hirt1, Martin Opitz2, Herbert Kappl2

  • 1The Hydrogen and fuel cell center (ZBT), Carl-Benz-Straße 201, 47057, Duisburg, Germany.

Chemphyschem : a European journal of chemical physics and physical chemistry
|March 14, 2024
PubMed
概括

研究人员通过将分离器涂上金属氧化物来提高硫电池的稳定性,减少聚硫化物穿,并提高实际应用的循环寿命.

关键词:
硫电池的使用情况磁铁子喷射喷射是一种磁铁子喷射.聚硫化物吸附吸附方式聚硫化物航天飞机的航天飞机分离器的修改分离器的修改

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The Synthesis of [Sn10SiSiMe334]2- Using a Metastable SnI Halide Solution Synthesized via a Co-condensation Technique
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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:

  • 硫电池具有高能量密度,但周期稳定性不佳.
  • 聚硫化物穿机制,涉及活性物质漏和副作用反应,阻碍了商业化.
  • 开发有效的策略来减轻聚硫化物穿对于推进电池技术至关重要.

研究的目的:

  • 研究磁铁喷雾金属氧化物涂层在聚烯分离器上的有效性,以减弱硫电池中的聚硫化物穿.
  • 分析氧硫化物,氧化和氧化涂料的形态和电化学性能.
  • 为了将涂层特性与它们对库伦比克效率和循环稳定性的影响相关联.

主要方法:

  • 使用磁铁喷雾技术,将氧化硫,氧化和氧化的无形涂层沉积在微孔聚烯分离器上.
  • 使用扫描电子显微镜 (SEM) 和X射线衍射 (XRD) 来描述涂层的形态.
  • 在半细胞中进行了电化学循环,以评估性能提升.

主要成果:

  • 金属氧化物涂层有效地减弱了聚硫化物穿机制.
  • 应用涂料显著提高了库伦比克效率和循环稳定性.
  • SEM和XRD分析证实了涂料的无形性质.
  • 观察到涂层之间的性能差异与它们的化学和吸附性有关.

结论:

  • 将金属氧化物 (氧化硫,氧化,氧化) 喷射到分离器上是一种可行的策略,可以提高硫电池的性能.
  • 这些涂层有效地抑制了聚硫化物穿,从而提高了库伦比克效率和循环稳定性.
  • 该研究提供了对先进硫电池分离器材料选择的见解.