液体と固体のようなイオン輸送の共存
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
まとめ
メタル・オーガニック・フレームワーク (MOF) は,様々なカチオンの固体電解質として作用する. これらのユニークな材料は固体と液体のようなイオン輸送を組み合わせて,エネルギー貯蔵アプリケーションに調節可能な伝導性を提供します.
科学分野:
- 材料科学
- 電気化学
- 固体化学
背景:
- メタル・オーガニック・フレームワーク (MOF) は,多用途 (偽) 固体電解質としてますます認識されています.
- MOFは,Li+,Na+,K+,Mg2+,Zn2+,Sr2+を含むカチオン輸送のためのユニークな可能性を提供しています.
- 構造は固体状態の性質と 毛穴内の液体のような性質を組み合わせています
研究 の 目的:
- 特定のカチオン交換アニオンMOF内の様々なイオン伝導性を調査する.
- MOFの固体と液体のような輸送メカニズムを組み合わせる.
- イオンサイズ,フレームワークの相互作用,および欠陥などの要因がイオン移動性にどのように影響するかを理解する.
主な方法:
- カチオン交換アニオンMOF [Cu3 ((μ3-OH)) ((ピラゾール-4-カルボキシラート)) ]の合成と特徴づけ.
- Li+,Na+,K+,Mg2+,Zn2+,Sr2+のイオン伝導性を測定する.
- ソルバットイオン半径,フレームワーク相互作用,電荷载体濃度,空白部位を含むイオン伝導性に影響する要因の分析.
主要な成果:
- MOF内のLi+,Na+,K+,Mg2+,Zn2+,Sr2+イオンの移動性が実証されている.
- 4.3 × 10-6 S/cm (Zn2+) から 1.7 × 10-3 S/cm (K+) までのイオン伝導率値を達成した.
- MOFにおけるイオン輸送は,直接的なフレームワークの相互作用と,毛穴内の液体のような拡散の両方を含んでいる.
結論:
- 研究されたMOFは,幅広い技術的に重要なカチオンの輸送を容易にする.
- MOFのイオン伝導性は,固体と液体のような輸送現象の複雑な相互作用によって影響を受けます.
- MOFは,高度な固体電解質アプリケーションのための有望な材料のクラスです.
関連する概念動画
Metallic 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
Ionic 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
Metal-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
Molecular 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
Ionic 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
Bonding 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


