在高性能离子电池的非易燃深度环节性电解质中产生协同协调效应
Ao Xu1, Li Zhao1, Jingyuan Yu1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, P.R. China.
Angewandte Chemie (International ed. in English)
|September 23, 2025
概括
研究人员使用N-甲基胺和二酸开发了一种新型的深度解电解质 (DEE),用于更安全的离子电池 (SIB). 这种先进的电解质提高了导电性,稳定性和性能,为下一代能源存储铺平了道路.
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:
- 深度环氧电解质 (DEE) 对于推进安全的离子电池 (SIB) 是至关重要的.
- 一个关键的挑战是开发能够平衡导电性,接口兼容性和安全性的DEE.
- 现有的DEE经常难以满足对高性能SIBs的这些苛刻要求.
研究的目的:
- 通过结合N-甲基胺 (NMA) 和二氧化 (NaDFOB) 酸盐 (NaDFOB) 来设计一种用于SIB的新型DEE.
- 研究DEE内部的协同作用 (Na-键和键) 以及它们对电池性能的影响.
- 评估开发的DEE在SIB中的电化学特性,接口兼容性和循环稳定性.
主要方法:
- 通过混合N-甲基胺 (NMA) 和二二 (NaDFOB) 的方法合成DEE.
- 描述DEE的离子导电性,氧化电压和不易燃性.
- 使用开发的DEE,对NVPidiyegaNa细胞和全细胞进行电化学测试,包括循环性能,速率能力和高温稳定性.
主要成果:
- 设计的DEE具有高离子导电性 (在25°C时为4.03mS cm−1) 和高氧化电压 (4.63V与Na+/Na对比).
- 该DEE证明了不易燃性和增强的电极-电解质接口兼容性.
- 体体体细胞表现出极好的循环性能 (在5°C的7000个循环后保持86.8%) 和速率能力,在高温下表现强.
- 全细胞在循环稳定性 (在300个循环后保持90.7%) 和速率性能方面取得了显著的改善.
结论:
- 在NMA-NaDFOB DEE中,Na-键和键之间的协同作用是其卓越性能的关键.
- 这种基于胺的DEE为设计高性能和安全的离子电池的先进电解质提供了有前途的途径.
- 开发的DEE显著提高了SIB技术在未来储能应用中的潜力.
相关概念视频
Ionic 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
Electrolytes: 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
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
Ionic Bonds
128.7K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
128.7K
Electrolysis
30.2K
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...
30.2K
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


