在金属电池的液体电解质中不溶性添加剂的关键作用
Zhu Xu1, Kexuan Wang1, Heng Li1,2
1Institute of Applied Physics and Materials Engineering, University of Macau, Macau SAR, 999078, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|May 16, 2024
概括
不溶性添加剂通过改善离子运输和稳定性来增强可充电金属电池. 本评论探讨了它们的功能,以提高电池性能和安全性.
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:
- 可充电金属电池具有高能量密度,但面临着诸如缓慢的离子传输,短周期寿命和安全问题等挑战.
- 电解质添加剂是一种常见的策略,但可溶性添加剂往往缺乏可靠性,并对性能产生负面影响.
- 不溶性添加剂是有希望的替代品,因为它们的稳定性,机械强度和调节性质.
研究的目的:
- 提供金属电池中不溶性添加剂的全面审查.
- 总结不溶性添加剂在提高电池性能方面的各种功能.
- 为不溶性固体添加剂提出未来的研究方向和挑战.
主要方法:
- 文献综述和对金属电池中不溶性添加剂的现有研究进行综合.
- 分析不溶性添加剂调节离子运输的机制.
- 评估不溶性添加剂在保护金属阳极和改善阴极方面的作用.
- 评估不溶性添加剂所带来的安全增强.
主要成果:
- 不溶性添加剂有效调节离子运输,导致更高的充/放电率.
- 这些添加剂为金属阳极提供了强大的保护,并提高了阴极的稳定性.
- 不溶性添加剂对提高电池整体安全性作出了重大贡献.
- 该审查巩固了目前关于不溶性添加剂多方面的好处的知识.
结论:
- 不溶性添加剂是克服可充电金属电池局限性的关键组成部分.
- 对不溶性固体添加剂的进一步研究对于推进电池技术至关重要.
- 本次审查旨在激发进一步研究,以提高金属电池的性能和安全性.
相关概念视频
01:19Ionic Strength: Effects on Chemical Equilibria
1.4K
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...
1.4K
03:24Common Ion Effect
41.6K
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:
41.6K
02:21Electrolyte and Nonelectrolyte Solutions
62.8K
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.
62.8K
03:45Formation 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...
23.6K
01:09Colloidal precipitates
565
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...
565
04:01Factors Affecting Solubility
33.4K
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:
33.4K