在局部高度电解质中,溶解层对迁移的影响:分析各种抗溶剂贡献
Zhanlin Yang1, Guolin Hu2, Chenyu Wang1
1Multiscale Computational Materials Facility & Materials Genome Institute, School of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, PR China.
Journal of colloid and interface science
|January 3, 2025
概括
局部高度电解质 (LHCEs) 提高了离子电池 (LIB) 的性能. 抗溶剂特性极大地影响电解质活性和Li+扩散,指导了先进的LIBs的设计.
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
- 计算化学计算化学
背景情况:
- 局部化高度电解质 (LHCEs) 是一种新的方法,可以增强储能器件中的电解质功能.
- 了解抗溶剂在调节电解质特性中的作用,对于设计有效的LHCE至关重要.
- 抗溶剂在LHCE溶解结构中影响电化学反应的精确机制需要进一步阐明.
研究的目的:
- 调查抗溶剂物理化学特性与它们对离子电池 (LIB) 性能的影响之间的相关性.
- 阐明LHCE中电化学活性对抗溶剂调制的机制.
- 为高性能LIBs的合理设计提供见解.
主要方法:
- 使用了全面的多尺度理论模拟.
- 实验性表征与理论模拟相结合.
- 在LiFSI/DME电解质系统中,系统地研究了九种不同的抗溶剂 (链式和循环非).
主要成果:
- 在同一类内的抗溶剂的相对分子质量与得到的溶液密度之间观察到正相关性.
- DME与抗溶剂混合物的粘度与成分之间的相互作用能量大小呈正相关性.
- +离子的自我扩散系数与+DME和+FSI相互作用能量之和正相关,受抗溶剂类的影响.
结论:
- 这项研究揭示了LHCE中抗溶剂特性,电解质特性和Li+运输之间的关键关系.
- 结果提供了对LHCE行为的更深入的理解,这对于推进LIB技术至关重要.
- 结果促进了下一代LIB的设计,通过战略性反偿债选择提高了性能.
相关概念视频
Common Ion Effect
41.0K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
41.0K
Ionic Strength: Effects on Chemical Equilibria
1.3K
The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary...
In this solution, the primary...
1.3K
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...
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
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
Solvating Effects
7.3K
An understanding of the solvating effect helps rationalize the relation between solvation and acidity of the compound. In addition, this also explains the relative stability of conjugate bases for compounds with different pKa values. This lesson details, in-depth, the principle of solvating effects. The strength of an acid and the stability of its corresponding conjugate base are determined using pKa values. This observed relationship is a consequence of solvation, which is the interaction...
7.3K
Factors Affecting Solubility
33.0K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
33.0K


