通过双极-双极相互作用实现对宽温度离子电池的温度响应溶解
Meilong Wang1, Luming Yin1, Mengting Zheng2
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Hubei, Wuhan, 430070, P. R. China.
Nature communications
|October 14, 2024
概括
本研究介绍了可充电电池的新型适应温度的电解质,可以在广泛的温度范围内提高耐用性. 创新的设计确保了从-60°C到55°C的稳定性能,这对于航空航天和潜艇应用至关重要.
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
- 电池技术 电池技术
背景情况:
- 可充电电池需要在广泛的温度范围内具有很高的耐用性,特别是用于航空航天和潜艇应用.
- 目前的电池技术在极端温度下表现下降,原因是有限的操作范围.
- 设计宽温度电解质在防止高温降解和确保低温反应动力学方面面临挑战.
研究的目的:
- 为可充电电池开发一种适应温度的电解质.
- 为了解决高温下的寄生反应,并在低温下改善反应动力学.
- 为了使电池在广泛的温度范围内稳定运行.
主要方法:
- 通过调节双极-双极相互作用,设计了一种适应温度的电解质.
- 在不同温度下研究电解质行为和溶解结构.
- 在广泛的温度范围内 (-60至55°C) 验证了性能.
主要成果:
- 设计的电解质可以防止在高温下降解.
- 它促进了溶解结构的适应性变化,随着温度的变化.
- 在60~55°C的广泛温度范围内实现了稳定的电池运行.
结论:
- 适应温度的电解质设计成功地应对了广泛温度电池运行中的挑战.
- 二极二极相互作用在调节温度弹性溶解结构方面具有重要意义.
- 这种方法为开发适用于极端环境的先进电解质提供了新的途径.
相关概念视频
Induced Electric Dipoles
4.2K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
4.2K
Aqueous Solutions and Heats of Hydration
14.6K
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...
14.6K
Intermolecular Forces
57.8K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
57.8K
Electrolyte and Nonelectrolyte Solutions
62.4K
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.
62.4K
Solvating Effects
7.4K
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...
7.4K
Electrolytes: van't Hoff Factor
33.0K
Colligative Properties of Electrolytes
The colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one...
The colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one...
33.0K


