金属电池的以为基础的电解质的丰富溶解工程在-40°C
Yongjian Yang1, Yang Yang1, Zijian Chen1
1Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China.
Angewandte Chemie (International ed. in English)
|October 21, 2025
概括
这项研究引入了用于金属电池的新型三甲基酸盐 (TEP) 电解质,提高了低温性能. 基于TEP的系统增强了离子动力学和固体电解质接口稳定性,以实现可靠的超低温操作.
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:
- 金属电池 (SMB) 具有高容量,但面临着缓慢的离子动力学和低温不稳定的固体电解质接口 (SEI) 的挑战.
- 商业电解质限制了中小企业在寒冷条件下的性能,原因是Na+脱溶和SEI形成不佳.
研究的目的:
- 开发一种新的超低温,不可燃电解质,以提高金属电池的性能.
- 研究三甲基酸盐 (TEP) 在改善离子脱溶和SEI层形成中的作用.
主要方法:
- 分析离子溶解结构和溶解能量障碍的理论计算.
- 基于的新型电解质系统的电化学测试,在对称和全细胞中结合TEP.
- 接口分析,以研究 TEP 对 SEI 层组成的影响.
主要成果:
- 基于TEP的电解质具有低点,低粘度和低极性,可以在超低温下工作.
- 理论计算证实,TEP会改变化结构,从而降低Na+脱溶能障碍.
- 在对称细胞中在-40°C下稳定循环超过1500小时,在完整细胞中在0.5°C下经过500个循环后达到98.4%的容量保留.
结论:
- 这种基于TEP的新型电解质系统显著提高了金属电池的低温性能.
- 电解质促进形成富含无机物SEI层,这对于稳定的电化学循环至关重要.
- 这一进步为在极寒环境下可靠的中小企业应用铺平了道路.
更多相关视频
11:04Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
13.4K
10:03Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
26.0K
相关概念视频
02:21Electrolyte and Nonelectrolyte Solutions
71.0K
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.
71.0K
01:19Ionic Strength: Effects on Chemical Equilibria
2.5K
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...
2.5K
03:08Electrolytes: van't Hoff Factor
36.3K
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...
36.3K
02:42Aqueous Solutions and Heats of Hydration
17.4K
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...
17.4K
01:17Ion 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
03:00Electrolysis
30.1K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
30.1K