一种混合超强协调溶剂和用于高压以太基金属电池的离子导电稀释剂
Xiaoxin Xie1, Junjun Fu2, Ruoxi Wang2
1Institute of Emergent Elastomers, School of Materials Science and Engineering, South China University of Technology, Guangdong 510640, China.
Journal of the American Chemical Society
|September 12, 2025
概括
这项研究探讨了以太溶剂协调如何影响离子电池性能. 混合电解质结合了强和弱的协调,增强了稳定性和离子导电性,使电池循环更好.
科学领域:
- 电化学
- 材料科学
- 电池技术
背景情况:
- 离子电池的性能严重依赖于Li+溶解结构和电极-电解质接口.
- 基于以太的电解质对高压应用具有前景,但需要谨慎设计以平衡协调和导电性.
研究的目的:
- 系统地研究以太溶剂与+的协调强度对电池性能的影响.
- 开发一种新的混合电解质,以提高金属电池的循环稳定性.
主要方法:
- 使用各种以太溶剂 (皇冠以太,二甲,二醇二甲) 的化和电化学性能的比较分析.
- 电解质配方,包括接口受体剂 (二硫) 胺,乙烯碳酸盐).
- 一种混合电解质的设计和测试,该电解质结合了12-皇冠-4 (12-C-4) 和六二甲基乙醇 (HDE).
主要成果:
- 较弱和较强的协调乙烯表现出较强的抗氧化作用.
- 较弱的协调增强了Li+的溶解和Li金属阳极的性能.
- 拟议的混合电解质 (12-C-4/HDE) 显示出优异的离子导电性和界面稳定性,显著改善Li//LiNi0.85Mn0.075Co0.075O2细胞的循环.
结论:
- 在设计高性能电解质时,以太协调强度是关键因素.
- 混合电解质为优化离子电池电解质提供了一个新的范例.
- 开发的混合电解质为稳定的高压金属电池提供了有前途的解决方案.
相关概念视频
Ion Exchange
1.1K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.1K
Batteries and Fuel Cells
30.7K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
30.7K
Electrolyte and Nonelectrolyte Solutions
71.1K
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.
71.1K
Ionic Bonding and Electron Transfer
48.8K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
48.8K
Metal-Ligand Bonds
24.0K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
24.0K
Leveling Effect
1.3K
In acid-base chemistry, the leveling effect refers to the limitation imposed by the solvent on the strength of acids and bases in solution. When a base stronger than the solvent's conjugate base is used, it deprotonates the solvent until the base is entirely consumed, making it ineffective against weaker acids. Conversely, an acid stronger than the solvent's conjugate acid protonates the solvent until the acid is depleted, rendering it ineffective against weaker bases. Essentially, the...
1.3K


