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相关概念视频

Intermolecular Forces in Solutions02:28

Intermolecular Forces in Solutions

33.0K
The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
33.0K
Aqueous Solutions and Heats of Hydration02:42

Aqueous Solutions and Heats of Hydration

14.3K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
14.3K
Energetics of Solution Formation02:35

Energetics of Solution Formation

6.7K
The formation of a solution is an example of a spontaneous process, which is a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
6.7K
Solution Formation02:16

Solution Formation

31.3K
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...
31.3K
Enthalpy of Solution02:39

Enthalpy of Solution

24.7K
There are two criteria that favor, but do not guarantee, the spontaneous formation of a solution:
24.7K
Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

62.2K
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.
62.2K

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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在低温电解质设计中溶解,溶解和扩散.

Yang Dong1,2, Honglu Hu1, Ping Liang1

  • 1Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, China.

Nature reviews. Chemistry
|January 8, 2025
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概括

设计防水性电解质对于耐寒电池至关重要. 本综述探讨了改善结条件下的电解质性能的关键参数.

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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
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 水性基电池对储能充满希望,但面临着电解质结和低温下缓慢运动的挑战.
  • 开发耐寒电解质对于扩大这些电池的运行范围至关重要.

研究的目的:

  • 审查设计抗水性电解质的基本参数.
  • 评估在寒冷环境中提高电解质性能的策略.
  • 确定对抗寒冷电池电解质的未来研究方向.

主要方法:

  • 对盐溶解和溶解行为的分析.
  • 对电解质特性 (可溶性,离子扩散,点) 的离子和添加剂影响的研究.
  • 评估阴离子-离子-溶剂相互作用和低温性能策略.

主要成果:

  • 了解盐的特性,阳离子/添加剂效应和溶解结构是设计抗电解质的关键.
  • 现有策略可以改善涂/剥离动力学和在低温下储存阴极电荷.
  • 确定了当前在耐寒电解质配方方面的挑战.

结论:

  • 需要对抗寒冷的水性电解质配方进行进一步的研究,以便在不同气候下实际应用电池.
  • 优化电解质成分和理解接口现象对于克服低温限制至关重要.
  • 本次审查为开发可靠的基于的储能系统提供了路线图.