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相关概念视频

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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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.
62.1K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

41.1K
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. 
41.1K
Metallic Solids02:37

Metallic Solids

18.2K
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....
18.2K
Ionic Bonds00:42

Ionic Bonds

117.8K
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...
117.8K
Network Covalent Solids02:18

Network Covalent Solids

13.3K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
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用于全固态电池的柔性无机固体电解质

Tao Yu1,2, Yuankai Liu1,2, Haoyu Li1,2

  • 1College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Microstructures, Collaborative Innovation Centre of Advanced Microstructures, Center for Energy Storage Materials and Technologies, Nanjing University, Nanjing 210093, P. R. China.

Chemical reviews
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概括

状固体电解质是先进的全固态电池 (ASSB) 的关键. 本综述探讨了五种类型,突出了它们克服挑战并使实用,高性能ASSB的潜力.

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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:

  • 固体电解质是全固态电池 (ASSB) 的关键组成部分,影响离子运输和电极兼容性.
  • 与刚性氧化物相比,状固体电解质在压力下提供优越的离子传输,显示出工业潜力.
  • 一个单一的柔性固体电解质作为阴解质,散装电解质和无解质仍然是一个挑战.

研究的目的:

  • 审查和讨论ASSB五种类型的无机固体电解质:硫化物,化物,化物,抗矿类型的化物和复杂化物.
  • 分析与每个电解质类型相关的优势和挑战.
  • 评估不同固体电解质的适用性,以满足电解质,散装电解质和无解质的功能.

主要方法:

  • 文献综述和对ASSB固体电解质现有研究的综合.
  • 系统地讨论压力对ASSB性能的影响.
  • 分析各种固体电解质类的功能特征和物理化学特性.

主要成果:

  • 五种类型的固体电解质 (硫化物,化物,化物,抗化物,复合化物) 被评估用于ASSB应用.
  • 状固体电解质显示出有前途的离子输送特性,特别是在冷压下.
  • 结合不同的固体电解质类型可以利用个人优势提高ASSB性能.

结论:

  • 了解各种固体电解质的特性对于设计有效的ASSB至关重要.
  • 定制电解质用于特定功能 (催解质,散装,无解质) 是优化电池性能的关键.
  • 本综述提供了开发实用,高性能ASSB的见解,通过明智地选择和组合固体电解质.