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相关概念视频

Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
Molecular Shape and Polarity03:37

Molecular Shape and Polarity

Dipole Moment of a Molecule
Solution Formation02:16

Solution Formation

There is no one solvent that can dissolve every type of solute. Some substances that readily dissolve in a certain solvent might be insoluble in a different solvent. A simple way to predict which substances dissolve in which solvent is the phrase "like dissolves like". This means that polar substances, such as salt and sugar, dissolve in a polar substance like water. In contrast, non-polar substances are more soluble in non-polar solvents such as carbon tetrachloride.
This selective solubility...
Solubility03:00

Solubility

Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules, atoms, and/or ions)...
Electrical Transport01:29

Electrical Transport

The electrical transport property of a material is defined by its resistance and conductivity. Resistance is the measure of a material's ability to resist the flow of electric current, while conductivity gauges its ability to allow the current to pass through, depending on the geometry of the measurement cell, such as electrode spacing and area. Conductivity is measured in Siemens (S). There are different types of conductance, including specific conductance, equivalent conductance, and molar...
Theory of Strong Electrolytes01:23

Theory of Strong Electrolytes

The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...

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相关实验视频

Updated: Jul 19, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

没有溶剂的电解质,具有类似水溶液的导电性.

Wu Xu1, C Austen Angell

  • 1Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287, USA.

Science (New York, N.Y.)
|October 18, 2003
PubMed
概括

没有溶剂的液体电解质可以与水溶液的导电性相匹配. 这些新型的质子转移盐具有高的离子性和流动性,使它们适合燃料电池应用.

科学领域:

  • 电化学 电化学 电化学
  • 材料科学 材料科学 材料科学

背景情况:

  • 由于水的特性,水溶液传统上被认为是最佳的电解导体.
  • 由于水性电解质在某些应用中的局限性,需要探索替代品.

研究的目的:

  • 为了研究无溶剂液体电解质的导电性.
  • 为了证明这些电解质可以匹配或超过水溶液的性能.
  • 评估它们作为燃料电池电解质的潜力.

主要方法:

  • 质子转移盐在环境温度下液体的合成和表征.
  • 在各种温度下测量离子导电性.
  • 分析导致高导电性的因素,包括流动性和离子性.

主要成果:

  • 无溶剂的质子转移盐具有与水溶液相比的导电性.
  • 在25°C测量了超过150mS/cm的导电性,在100°C测量了470mS/cm的导电性.
  • 高导电性归因于高流动性和离子性,在特定情况下有质子的贡献.

结论:

  • 由质子转移盐组成的液体电解质为水性电解质提供了可行的替代品.

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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions
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1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions

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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Published on: April 12, 2018

  • 这些电解质具有燃料电池应用的理想特性,包括高导电性和低蒸气压.
  • 对质子转移盐的进一步研究可以推进电化学能量储存和转换技术.