定制的电解质盐离子化学,用于增强的高离子电池
Shitao Wang1,2, Lixin Qiao1,2, Jinlong Li1,2
1Qingdao New Energy Shandong Laboratory, Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.
Nature communications
|December 11, 2025
概括
研究人员通过修改离子结构开发出一种新的盐LiDFTFB. 这种稳定的盐显著提高了下一代离子电池的性能和寿命,特别是在高温下.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 像LiPF6和LiDFOB这样的盐的不稳定性阻碍了下一代离子电池的开发.
- 在高温下LiPF6降解,形成腐蚀性HF.
- LiDFOB表现出对水分的敏感性和不良解离.
研究的目的:
- 为先进的离子电池设计一种具有增强稳定性和性能的新盐.
- 通过离子骨架编辑解决当前商业和有前途的盐的局限性.
- 提高高性能离子电池的整体安全性和效率.
主要方法:
- 通过在DFOB-离子中用-CF3组取代碳基组来编辑阳离子骨架的策略.
- 合成了新的盐,2,2-二四四四五四 ((三甲基) -1,3,2-二氧化-2-化物 (LiDFTFB).
- 在高温 (50°C) 处对石墨的 LiNi0.8Mn0.1Co0.1O2 囊细胞中的 LiDFTFB 进行电化学测试.
主要成果:
- 与LiPF6和LiDFOB相比,LiDFTFB表现出优越的水分,热和电化学稳定性.
- 新的盐具有出色的离子导电性,可溶性和板被动性.
- 在50°C的650个循环后,使用LiDFTFB的LiNi0.8Mn0.1Co0.1O2囊细胞保持了81.7%的容量.
结论:
- 离子化学的战略调制对于推进离子电池技术至关重要.
- LiDFTFB为开发稳定和高性能下一代离子电池提供了一个有前途的解决方案.
- 开发的离子骨编辑策略为设计先进的电解质盐提供了一条途径.
更多相关视频
10:03Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
26.0K
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
相关概念视频
01:19Ionic Strength: Effects on Chemical Equilibria
2.4K
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...
2.4K
03:12Batteries and Fuel Cells
30.6K
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...
30.6K
02:48Ionic Bonding and Electron Transfer
48.4K
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.
48.4K
01:12Ionic Strength: Overview
2.7K
The ionic strength of a solution is a quantitative way of expressing the total electrolyte concentration of a solution. This concept was first introduced in 1921 by two American physical chemists, Gilbert N. Lewis and Merle Randall, while describing the activity coefficient of strong electrolytes. During the calculation of ionic strength (I or μ), all the cations and anions are considered. However, the concentration (c) of an ion with a greater charge number (z) has a greater contribution...
2.7K
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
01:08Electrodeposition
1.2K
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
1.2K