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相关概念视频

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Molecular and Ionic Solids02:54

Molecular and Ionic Solids

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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...
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Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

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

Trends in Lattice Energy: Ion Size and Charge

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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:
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Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

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Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
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Ionic Bonds00:42

Ionic Bonds

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Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
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相关实验视频

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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高的阿吉罗代特固体电解质使稳定的全固态电池成为可能.

Shenghao Li1, Jing Lin2, Mareen Schaller3

  • 1Center of Smart Materials and Devices, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing &, School of Material Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China.

Angewandte Chemie (International ed. in English)
|October 30, 2023
PubMed
概括
此摘要是机器生成的。

固体电解质中的配置对离子流动性产生了积极的影响. 这项研究表明,调整 argyrodites 中的复杂成分可以提高先进固态电池的离子导电性.

关键词:
阿尔吉罗狄特 (Argyrodite) 是一种石.高的材料 高的材料固体电解质是一种固体电解质.固态电池 固态电池是什么

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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:

  • 超离子固体电解质 (SE) 对固态电池 (SSB) 的发展至关重要.
  • 了解配置 (ΔSconf) 在多元件SE的离子导电性中的作用至关重要,但缺乏.
  • argyrodites 是一个有前途的SE材料.

研究的目的:

  • 为了研究具有素丰富的 argyrodites的配置和离子导电性之间的相关性.
  • 为了合成和表征一系列Li5.5 PS4.5 Clx Br1.5-x化合物.
  • 展示这些材料在高性能SSB中的潜力.

主要方法:

  • 合成富含素的氧化 (Li5.5 PS4.5 Clx Br1.5-x) 的合成.
  • 中子粉衍射和P魔法角旋转核磁共振光谱学用于结构和组成分析.
  • 在室温下测量离子导电性.

主要成果:

  • 在子子网上对S2-/Cl-/Br占用量的定量分析.
  • 阳性相关性观察到阴离子子网乱 (ΔSconf) 和离子动态.
  • 在室温下达到了22.7mS cm-1的离子导电率,对于Li5.5 PS4.5 Cl0.8 Br0.7 (ΔSconf =1.98R).
  • 在SSB细胞中使用优化SE.90的SSB单晶LiNi0.9Co0.06Mn0.04O2 (s-NCM90)复合阴极的稳定循环证明.

结论:

  • 首次实验证据将离子子子网的配置与SEs中的离子流动性联系起来.
  • 定制组合复杂性是提高陶离子导体中的离子导电性的可行策略.
  • 双替代 argyrodites显示出对高性能电化学储能应用的显著前景.