基于电荷移位的三基离子多孔有机聚合物作为金属电池的准固态电解质
Yufei Yuan1, Dan-Dong Wang2, Zhengyang Zhang2
1Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong SAR, China.
ACS applied materials & interfaces
|August 13, 2024
概括
研究人员开发了用于金属电池的新型准固态电解质. 这些离子多孔有机聚合物在金属电池中表现出高导电性,稳定性和出色的性能,克服了关键的限制.
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
- 聚合物化学 聚合物化学
背景情况:
- (Li) 金属电池的理想固体电解质需要快速的Li+导电,高转移数,稳定的电极接口和电化学稳定性.
- 目前固体电解质开发的局限性阻碍了高性能金属电池 (LMB) 的发展.
研究的目的:
- 设计和合成一种新型的准固态电解质,满足先进的金属电池的多个关键标准.
- 为了研究 Li+ 协调的三基离子多孔有机聚合物 (Li+@iPOPs) 作为 LMBs 中的电解质的性能.
主要方法:
- 基于Li+协调的三基离子多孔有机聚合物 (Li+@iPOPs) 的合成,使用imidazolates和phenoxides.
- 离子导电性,激活能量,Li+转移数,电化学稳定性窗口和电极兼容性的表征.
- 使用Li+@Trp-Im-O-POPs准固态电解质和LiFePO4阴极组装和测试金属电池.
主要成果:
- 实现了高离子导电率 (4.38 mS cm-1),低激活能量 (0.627 eV) 和高Li+转移数 (0.95).
- 证明了出色的电化学稳定性 (高达4.4V) 和与金属电极的兼容性,在循环过程中显示稳定性.
- 金属电池的初始容量为114 mAh g-1,在200个周期内保持86.7%的容量.
结论:
- 设计的Li+@iPOP为金属电池中的准固态电解质提供了一个有前途的解决方案.
- 聚合物骨干中的电荷移位机制促进了高效的Li+扩散,提高了电池的性能.
- 这些发现为开发更安全,更高效的下一代储能设备铺平了道路.
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
12.9K
10:03Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
25.4K
相关概念视频
02:54Molecular and Ionic Solids
17.0K
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...
17.0K
02:48Ionic Bonding and Electron Transfer
41.3K
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.
41.3K
01:17Ion Exchange
565
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...
565