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相关概念视频

Ionic Crystal Structures02:42

Ionic Crystal Structures

14.2K
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...
14.2K
Molecular and Ionic Solids02:54

Molecular 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...
17.0K
Metallic Solids02:37

Metallic Solids

18.3K
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....
18.3K
Ionic Bonding and Electron Transfer02:48

Ionic 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
Formation of Complex Ions03:45

Formation of Complex Ions

23.5K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.5K
Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

23.8K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.8K

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相关实验视频

Updated: Jun 11, 2025

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

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Published on: March 24, 2018

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用结合的离子联合晶体用于快速固态离子存储.

Hu Hong1, Yu Wang1, Yaqin Zhang1

  • 1Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, China.

Advanced materials (Deerfield Beach, Fla.)
|October 7, 2024
PubMed
概括

研究人员为先进的固态设备开发了新的结合离子联合晶体 (HIC). 这些HIC能够快速运输离子,在低温下具有高导电性,并提高电池性能.

关键词:
谷物界限 谷物界限 谷物界限具有键的离子联合晶体.固态电解质 固态电解质

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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
  • 固态化学 固态化学

背景情况:

  • 为设备开发固态离子导体仍然具有挑战性.
  • 结合的离子联合晶体 (HIC) 由于灵活的骨架和独特的离子特性,提供了潜在的潜力.
  • 在HIC中空缺的职位可以促进谷物边界的化运输道.

研究的目的:

  • 为高效的离子 (Zn2+) 运输设计和优化一个HIC.
  • 为了研究HIC作为储能器件中的固体电解质的性能.
  • 展示HIC在低温和高速应用中的潜力.

主要方法:

  • 通过调整盐和伊米达的比率来优化HIC组成.
  • 在不同温度 (25°C和-40°C) 处表征离子导电性.
  • 评价对称电池,固态Zn能电池和共价有机框架全电池以及离子混合超级电容器的性能.

主要成果:

  • 在低激活能量 (≈0.12 eV) 的情况下,实现了高离子导电性 (≈11.2 mS cm-1在25°C,≈2.78 mS cm-1在-40°C).
  • 在 Zn 对称细胞中,已证明抑制了状的生长和低超电位 (<200 mV 在 5.0 mA cm-2) .
  • 实现了固态电池的稳定低温运行和离子混合超级电容器的高速能力.

结论:

  • 优化的HIC可以创建有效的基于谷物边界的Zn2+运输通道.
  • 开发的HIC表现出卓越的离子导电性,低温性能和接口兼容性.
  • 这项工作提出了一个可行的策略,用于创建易于制备,低成本和环保的离子导体,用于先进的能量存储.