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相关概念视频

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...
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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
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
Network Covalent Solids02:18

Network Covalent Solids

13.4K
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...
13.4K
Ionic Bonds00:42

Ionic Bonds

118.1K
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...
118.1K
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...
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离子共价有机框架 固态电解质 离子共价有机框架

Yoonseob Kim1,2, Chen Li1, Jun Huang1

  • 1Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China.

Advanced materials (Deerfield Beach, Fla.)
|August 19, 2024
PubMed
概括
此摘要是机器生成的。

离子共价有机框架 (ICOF) 为更安全,高能量密度的固态金属电池 (LMB) 提供了一个有前途的途径. 克服它们的脆弱性是释放下一代储能潜力的关键.

关键词:
离子运输路径的离子运输路径.离子共价有机有机框架金属电池是金属电池的一种.固态电解质 固态电解质它们是二维聚合物.

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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
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • () 离子电池主导能源存储,但具有局限性.
  • 金属电池 (LMB) 提供更高的能量密度,但面临液体电解质的安全问题.
  • 固态电解质是减轻LMB安全问题的有希望的替代方案.

研究的目的:

  • 审查基于离子共价有机框架 (ICOF) 的固态电解质的最新进展.
  • 确定当前的挑战,并为LMB中的ICOF电解质提出未来的研究方向.
  • 探索ICOF对高能量密度全固态LMB的潜力.

主要方法:

  • 关于基于ICOF的固态电解质的最新文献的综述.
  • 对基电池的阳离子和阴离子COF进行分析.
  • 检查界面电阻和材料脆性作为限制.
  • 使用ICOFs对全固态和准固态电池设计的概念化.

主要成果:

  • 由于其晶体结构和离子导电性,ICOF显示出作为下一代固态电解质的潜力.
  • 确定的主要局限性是由于晶体ICOF固有的脆性而产生的高界面电阻.
  • 阳离子和阴离子COF正在探索它们在基电池应用中的适用性.

结论:

  • 在开发安全,高能量密度固态LMB方面,ICOF显示出显著的前景.
  • 解决ICOF的脆弱性和界面阻力对于其实际应用至关重要.
  • 对基于ICOF的固态电解质的进一步研究可以实现先进的电池技术.