通过低成本的金属 (Zr和Fe) 和F替代实现高离子导电化物固体电解质,以及它们在全固态电池中的令人佩的性能
Yuvaraj Subramanian1, Rajesh Rajagopal1, Kwang-Sun Ryu1
1Department of Chemistry, University of Ulsan, Doowang-dong, Nam-gu, Ulsan 44776, Republic of Korea.
ACS applied materials & interfaces
|May 6, 2024
概括
研究人员通过提高化物固体电解质导电性来提高固态电池的性能. 用Fe,Zr和F合Li3YCl6显著提高了离子导电性和电化学稳定性,以获得更好的全固态电池.
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
- 固态化学 固态化学
背景情况:
- 化物固体电解质 (SE) 为固态电池提供高电化学稳定性,防止接口侧反应.
- 然而,传统的化物SE具有较低的离子导电性,这阻碍了它们的实际应用.
- 提高离子导电性,同时保持稳定性,对于推进固态电池技术至关重要.
研究的目的:
- 为了增强Li3YCl6固体电解质的离子导电性.
- 研究Fe,Zr和F替代物对Li3YCl6.6的电化学特性的影响.
- 评估改性化物SEs作为全固态电池的电解质的潜力.
主要方法:
- 通过高能球磨,不经热处理,合成改性Li3YCl6固体电解质.
- 在Y位点和F位点替换Fe和Zr元素.
- 使用X射线衍射来确认相位纯度的结构特征.
- 电化学评估离子导电性,电化学稳定性窗口和电池性能.
主要成果:
- 合成的化物SEs保持了Li3YCl6.6的纯四角形晶体结构.
- 与原始Li3YCl6 (0.26 mS cm-1) 相比,Li2.4Y0.4Zr0.6Cl6和Li2.4Y0.4Zr0.6Cl5.85F0.15的离子导电性显著提高 (2.05和1.45 mS cm-1).与原始Li3YCl6 (0.26 mS cm-1) 相比,它们的离子导电性显著提高.
- 在组装的固态电池中,Li2.4Y0.4Zr0.6Cl5.85F0.15显示了改进的电化学稳定性窗口 (1.293.9V) 和更高的初始库伦比效率 (87%).
结论:
- Fe,Zr和F的联合剂有效地提高了Li3YCl6固体电解质的离子导电性和电化学性能.
- 修改后的电解质Li2.4Y0.4Zr0.6Cl5.85F0.15显示出对全固态电池应用具有有前途的特性.
- 球磨合成路线为生产先进固体电解质提供了可扩展和高效的方法.
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
13.0K
10:03Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
25.5K
相关概念视频
Ionic Crystal Structures
14.3K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.3K
Ionic Bonding and Electron Transfer
41.4K
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.
41.4K
Molecular and Ionic Solids
17.1K
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...
17.1K
Batteries and Fuel Cells
27.3K
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...
27.3K
Electrolyte and Nonelectrolyte Solutions
62.8K
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.
62.8K
Metallic Solids
18.4K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.4K
