移動性Zn2+カチオンで満たされた全亜鉛金属有機基からの固体Zn-イオン導体
Andrei Iliescu1, Justin L Andrews1, Julius J Oppenheim1
1Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
Journal of the American Chemical Society
|November 27, 2023
まとめ
新しい金属有機構造体であるZnZnBTTは,新しい合成後の交換方法を使用して合成されました. この材料は準固体電池の 亜鉛イオン導体として有望です
科学分野:
- 材料科学
- 化学について
背景:
- メタル・オーガニック・フレームワーク (MOF) は,多用途な構造と調節可能な特性で知られています.
- MII3[(MII4Cl)3(BTT)82のMOFファミリーは,アニオンのソダライトのような構造を特徴として,広範に研究されている.
- このファミリーの新メンバーの合成と特性を理解することは 材料科学の進歩に不可欠です
研究 の 目的:
- 新しいMOF,Zn3[(Zn4Cl)3(BTT)8[2 (ZnZnBTT) を合成し,特徴づけるために.
- エネルギー貯蔵用の亜鉛イオン導体としての ZnZnBTT の可能性を調査する.
- MOFsのこのクラスへのアクセスを新しい合成ルートを探求する.
主な方法:
- Mn2+イオンを亜鉛と交換して ZnZnBTT を生成する.
- 合成されたMOFの構造的特徴.
- 亜鉛イオン伝導性と活性化エネルギーを決定する電気化学測定.
主要な成果:
- ZnZnBTTの合成が成功しました 以前は知られていなかったMOFです
- ZnZnBTTは,骨格と電荷均衡の2つの異なるサイトを示しています.
- この材料は,低活性エネルギー (Ea = 0.317 eV) で有望な亜鉛イオン伝導性 (σ = 1.15 × 10-4 S/cm) を示しています.
結論:
- ZnZnBTTは新種のMOFであり,合成後の改変によって利用可能である.
- 移動電荷バランスの取れた Zn2+カチオンはイオン伝導性に寄与する.
- ZnZnBTTは,準固体亜鉛イオン電池での応用の可能性を持っています.
さらに関連する動画
関連する概念動画
Ionic Crystal Structures
14.4K
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...
14.4K
Metallic Solids
18.4K
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....
18.4K
Crystal Field Theory - Tetrahedral and Square Planar Complexes
42.7K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
42.7K
Ionic Bonding and Electron Transfer
41.6K
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.
41.6K
Crystal Field Theory - Octahedral Complexes
26.6K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.6K
Metal-Ligand Bonds
20.8K
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...
20.8K


