准固体电解质具有柔性分支和刚性骨架,用于高温金属电池
Lanhua Ma1, Jiwei Zhao1, Mengjie Li1
1School of Materials Science and Engineering, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, China.
本研究介绍了一种用于高温金属电池的新型非易燃准固体电解质 (QSE). QSE增强了稳定性和安全性,使高压阴极能够提供长期的性能.
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
- 电池技术 电池技术
背景情况:
- 准固体电解质 (QSE) 对于下一代高能量密度金属电池至关重要.
- 高工作温度会引起副作用,限制QSE性能,特别是高压阴极.
研究的目的:
- 开发一种具有增强高温稳定性和安全性的非易燃QSE.
- 为了提高金属电池的电化学性能和接口稳定性.
主要方法:
- 使用与双组分聚合物主体的现场共聚合制造QSE的制造.
- 加入阻燃性和基塑化剂. 阻燃性和基塑化剂.
- 在高温下用LiFePO4和LiCoO2阴极对QSE进行电化学测试.
主要成果:
- QSE展示了一个共聚合物宿主,具有用于离子迁移的灵活分支和用于热稳定的刚性骨架.
- 优化的增塑剂有效地清除激素,提供广泛的电化学窗口 (4.7V) 和出色的接口稳定性.
- 证明LiFePO4的高容量保留 (82.3%在5°C,80°C的1000个循环后) 和LiCoO2.2的稳定循环 (400个循环在4.5V,60°C).
结论:
- 开发的非易燃QSE为金属电池提供了卓越的高温性能和安全性.
- 该QSE的独特结构和构成使可逆涂/脱落以及与高压阴极的兼容性.
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
10:03Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
相关概念视频
Molecular and Ionic Solids
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...
Ionic Bonding and Electron Transfer
Metallic Solids
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
Batteries and Fuel Cells
Ionic Bonds
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...
Ionic Crystal Structures
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...
