通过金属-硫相互作用实现的陶-聚合物复合体固体电解质,具有增强的离子导电性
Beibei Jiang1, Zhantao Liu2, Hailong Chen2
1Department of Electrical and Computer Engineering, Kennesaw State University, Marietta, Georgia 30060, United States.
概括
这项研究引入了陶聚合物固体电解质的新硫修饰策略,提高了先进的全固态电池的离子导电性和机械性能.
科学领域:
- 材料科学
- 电化学
- 聚合物科学
背景情况:
- 陶聚合物复合体固体电解质 (SE) 对全固态电池 (ASSB) 是有前途的.
- 由于电阻介面,它们的性能与纯陶相比受到较低的离子导电性限制.
- 提高接口特性对于高性能ASSB至关重要.
研究的目的:
- 开发一种用于同时修改复合固体电解质中的陶和聚合物组件的新方法.
- 增强离子在陶聚合物复合材料的跨相传输.
- 提高ASSB固体电解质的整体离子导电性和机械性能.
主要方法:
- 通过金属/硫相互作用引入含硫的功能组.
- 同时修饰的聚乙烯糖二烯酸 (PEGDA) 聚合物和Li6.4La3Zr1.4Ta0.6O12 (LLZO) 陶.
- 使用逐层制造硫改性LLZO-PEGDA复合材料的方法.
- 研究金属/硫相互作用机制和现场光聚合.
主要成果:
- 在LLZO-PEGDA复合材料中达到5.1 × 10^-4 S cm^-1的高离子导电性,超过纯LLZO.
- 在LLZO/LLZO和LLZO/PEGDA交界阶段证明了增强的离子传输.
- 复合固体电解质的强度和伸展性得到改善.
- 阐明了金属/硫相互作用中的优先协调和电子转移.
结论:
- 通过金属/硫相互作用实现的双重改造是设计先进的陶/聚合物复合材料的有希望的策略.
- 这种方法有效地提高了ASSB应用的离子导电性和机械性能.
- 开发的方法为复合固体电解质的合理设计提供了广泛的应用.
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
25.6K
06:34Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
Published on: September 19, 2020
5.9K
相关概念视频
Ionic Bonding and Electron Transfer
55.1K
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.
55.1K
Ionic Crystal Structures
21.4K
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...
21.4K
Metallic Solids
21.5K
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....
21.5K
Ionic Association
199
The ionic association is the association of oppositely charged ions in an electrolyte solution to form ion pairs. Bjerrum defined ion pairs as two oppositely charged ions whose electrostatic attraction exceeds the thermal energy of the system, typically expressed as 2kT. Electrostatic attraction depends on ionic charge, separation distance, and the dielectric constant of the medium. Thermal energy, represented by kT, reflects the tendency of ions to move independently due to molecular motion.
199
Theory of Strong Electrolytes
111
The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...
111
The Electrical Double Layer
194
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
194
