开发用于高压金属电池的化离子液体的准固态以太基电解质
Jin Li1, Junjie Chen1, Xiaosa Xu1
1Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, 999077, China.
Advanced materials (Deerfield Beach, Fla.)
|April 25, 2025
概括
这项研究引入了一种基于的新型离子液体,以克服树状石的形成和在准固态以太电解质中的不良氧化稳定性. 新的电解质使高能量密度的电池具有更好的循环寿命和性能.
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:
- 准固态以太基电解质面临的挑战包括树的生长和有限的氧化稳定性,阻碍了实际的电池应用.
- 这些问题影响了电池的周期寿命和能量密度,需要先进的电解质解决方案.
研究的目的:
- 设计和开发一种基于的新型离子液体,具有三托化电离子部分,用于增强的准固态电解质.
- 为了提高电极/电解质接口的稳定性,并抑制高能量密度电池中的树形成.
主要方法:
- 合成了一种基于的离子液体,其中含有三化化三化离子部分.
- 研究了在阴极和阳极接口上形成 LiF 丰富的交相.
- 使用开发的电解质制造并测试了使用Li-metal全电池 (LiFePO4,LiCoO2,LiNi0.8Co0.1Mn0.1O2) 的电解质.
主要成果:
- 设计的离子液诱导了强大的LiF丰富的介相,增强了阴极氧化稳定性并抑制了过渡金属离子溶解.
- 在阳极接口的LiF接口增加了模量,并有效地抑制了树的生长.
- 全电池在10°C,4.5V,高质量负载和广泛的温度范围 (-20-80°C) 中表现出卓越的性能.
- 一个2.66Ah袋式电池实现了超过356Wh的kg-1能量密度,具有出色的循环稳定性.
结论:
- 这种新的基于的离子液体策略有效地解决了准固态以太电解质的关键局限性.
- 这种方法为实用,高能量密度的电池铺平了道路,提高了安全性和寿命.
- 开发的电解质显示出下一代储能解决方案的巨大潜力.
相关概念视频
Ionic Bonding and Electron Transfer
39.2K
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.
39.2K
Electrolyte and Nonelectrolyte Solutions
61.9K
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.
61.9K
Batteries and Fuel Cells
26.7K
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...
26.7K
Electrolysis
25.7K
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...
25.7K
Ionic Bonds
117.2K
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...
117.2K
Molecular and Ionic Solids
16.5K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
16.5K


