液态和固态离子运输在金属有机框架中的共存
Alice Y Su1, Stefano Canossa2, Julius J Oppenheim1
1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Journal of the American Chemical Society
|October 14, 2025
概括
金属有机框架 (MOF) 作为各种的固态电解质. 这些独特的材料结合了固体和液体类离子传输,为储能应用提供可调节的导电性.
科学领域:
- 材料科学
- 电化学
- 固态化学
背景情况:
- 金属有机框架 (MOF) 越来越多地被认为是多功能 (伪) 固态电解质.
- MOF提供了独特的运输潜力,包括Li+,Na+,K+,Mg2+,Zn2+和Sr2+.
- 它们的结构结合了固态特性和孔内的液态特性.
研究的目的:
- 为了研究特定的离子可交换离子MOF中的各种离子的导电性.
- 研究MOF中结合的固体和液体类运输机制.
- 了解离子大小,框架相互作用和缺陷等因素如何影响离子的移动性.
主要方法:
- 合成和表征可交换的阴离子MOF [Cu3(μ3-OH) ((pyrazole-4-carboxylate) ]-.
- 对Li+,Na+,K+,Mg2+,Zn2+和Sr2+的离子导电性测量
- 分析影响离子导电性的因素,包括溶解离子半径,框架相互作用,电荷载体度和空位.
主要成果:
- 在MOF中证明了Li+,Na+,K+,Mg2+,Zn2+和Sr2+离子的移动性.
- 从4.3 × 10-6 S/cm (Zn2+) 到1.7 × 10-3 S/cm (K+) 的离子导电值.
- 确定MOF中的离子运输包括直接的框架相互作用和孔内的液态扩散.
结论:
- 研究的MOF促进了广泛的技术相关的的运输.
- MOF中的离子导电性受到固态和液态运输现象的复杂相互作用的影响.
- MOF代表了先进固态电解质应用的有前途的材料类.
相关概念视频
02:37Metallic Solids
20.5K
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....
20.5K
02:42Ionic Crystal Structures
16.8K
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...
16.8K
02:51Metal-Ligand Bonds
24.0K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
24.0K
02:54Molecular and Ionic Solids
19.9K
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...
19.9K
02:48Ionic Bonding and Electron Transfer
48.6K
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.
48.6K
02:32Bonding in Metals
51.8K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
51.8K