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相关概念视频

Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

23.6K
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:
23.6K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

16.6K
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...
16.6K
Ionic Crystal Structures02:42

Ionic Crystal Structures

14.0K
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...
14.0K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

40.1K
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. 
40.1K
Metallic Solids02:37

Metallic Solids

18.1K
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...
18.1K
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

1.1K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
1.1K

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相关实验视频

Updated: May 20, 2025

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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Z型间隙跳跃迁移在单临床LiBiBr4固态电解质中驱动高离子导电性

Yu Chao1, Sisheng Yang1, Chenyuan Xu1

  • 1Key Laboratory of Advanced Materials Technologies, International (Hong Kong Macao and Taiwan) Joint Laboratory on Advanced Materials Technologies, College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, China.

Small (Weinheim an der Bergstrasse, Germany)
|March 24, 2025
PubMed
概括
此摘要是机器生成的。

一种新的化物固体电解质,LiBiBr4,表现出优异的加工和高离子导电性. 它独特的Z型跳跃迁移途径促进了高效的离子运输,促进了基于素的电解质开发.

关键词:
二氧化4Br4是什么意思离子电池 离子电池迁移路径的迁移路径固态电解质 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:

  • 化物固体电解质对于先进的电化学应用至关重要,因为它们的高离子导电性和稳定性.
  • 现有的化物电解质通常需要高的加工压力,这限制了它们的实际应用.

研究的目的:

  • 设计和研究一种新的化物固体电解质LiBiBr4,以提高性能.
  • 将LiBiBr4与LiAlCl4和LiAlBr4进行比较,以了解离子迁移机制.
  • 阐明化物固体电解质中控制离子导电性的因素.

主要方法:

  • 首次设计和合成LiBiBr4固体电解质.
  • 与单一临床LiAlCl4和LiAlBr4.4进行比较的研究.
  • 对离子迁移路径和能量障碍的计算分析.
  • 测量离子导电性和激活能量.

主要成果:

  • 与化物电解质相比,LiBiBr4需要显著较低的加工压力 (<1/10).
  • 计算分析显示,Bi多面体的战略定位使Li+通路的干扰最小化.
  • 在LiBiBr4中,在ab轴上发现了一个独特的Z型间隙跳跃迁移,形成了一个3D间隙网络.
  • LiBiBr4实现了0.19 mS cm-1的高离子导电性,其低激活能量为0.349 eV.

结论:

  • LiBiBr4是一种有前途的化物固体电解质,易于加工,具有高离子导电性.
  • 已确定的跳跃迁移机制和结构特征是其卓越性能的关键.
  • 这项工作为开发高效的素基固体电解质提供了新的途径.