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相关概念视频

Ionic Crystal Structures02:42

Ionic Crystal Structures

14.9K
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...
14.9K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

42.4K
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. 
42.4K
Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

24.3K
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:
24.3K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

17.8K
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...
17.8K
The Born-Haber Cycle02:44

The Born-Haber Cycle

22.4K
Lattice Energy 
22.4K
Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

64.2K
Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
64.2K

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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无形化酸固态电解质用于高性能全固态电池.

Ting-Ting Wu1,2, Si-Jie Guo1, Hong-Shen Zhang1

  • 1CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P.R. China.

Angewandte Chemie (International ed. in English)
|July 3, 2025
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概括

具有-双离子框架的新型无形固态电解质使高压全固态电池成为可能. 这些电解质显示出增强的导电性和稳定性,这对于下一代能源储存至关重要.

关键词:
所有固态电池都是固态电池.化物固态电解质的电解质.高压稳定性 高压稳定性离子导电性的离子导电性二氧化双离子.

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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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:

  • 高性能固态电解质 (SSEs) 对于推进全固态电池 (ASSB) 是必不可少的.
  • 无形SSE提供优势,如无粒边界结构,以改善固体与固体之间的接触和均的离子流.
  • 目前的研究重点是开发用于高压应用的新型SSE.

研究的目的:

  • 开发和描述基于-双离子框架的新一类SSE.
  • 研究从晶体到无形相的结构过渡及其对离子导电性的影响.
  • 评估这些无形SSE在具有先进阴极的高压ASSB中的性能.

主要方法:

  • 合成具有不同含量 (Li3x+0.1ZrNxCl4.1) 的-双离子电解质.
  • 结构特征以确定过渡到无形阶段 (Li1.3ZrN0.4Cl4.1).
  • 电化学测试,包括离子导电量测量,氧化稳定性评估和使用LiNi0.83Co0.06Mn0.11O2 (NCM83) 阴极的全细胞循环性能.

主要成果:

  • 通过增加N3-替代,通过增加N3-替代实现了结构性过渡到无形阶段.
  • 无形Li1.3ZrN0.4Cl4.1电解质表现出增强的Li+导电性 (3.01 mS cm-1) 和改进的氧化稳定性 (高达4.8 V).
  • 完整细胞表现出高可逆容量 (200.1mAhg-1在4.5V),优异的容量保留 (95.1%在150个循环后) 和长期循环稳定性 (>3000个循环在3C).

结论:

  • -双离子无形电解质是传统单离子系统的有希望的替代品.
  • 开发的无形SSE与高压ASSB的高能NCM83阴极具有很好的兼容性.
  • 这些发现为为先进的电池技术设计下一代固态电解质铺平了道路.