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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 Crystal Structures02:42

Ionic Crystal Structures

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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...
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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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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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Ionic Covalent Organic Framework Solid-State Electrolytes.

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
Summary
This summary is machine-generated.

Ionic covalent organic frameworks (ICOFs) offer a promising path toward safer, high-energy-density solid-state lithium metal batteries (LMBs). Overcoming their brittleness is key to unlocking this potential for next-generation energy storage.

Keywords:
ion transport pathwaysionic covalent organic frameworklithium metal batteriessolid‐state electrolytestwo‐dimensional polymers

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Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
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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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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Lithium (Li)-ion batteries dominate energy storage but have limitations.
  • Li metal batteries (LMBs) offer higher energy density but face safety issues with liquid electrolytes.
  • Solid-state electrolytes are a promising alternative to mitigate safety concerns in LMBs.

Purpose of the Study:

  • To review recent advancements in ionic covalent organic framework (ICOF)-based solid-state electrolytes.
  • To identify current challenges and propose future research directions for ICOF electrolytes in LMBs.
  • To explore the potential of ICOFs for high-energy-density all-solid-state LMBs.

Main Methods:

  • Review of recent literature on ICOF-based solid-state electrolytes.
  • Analysis of anionic and cationic COFs for Li-based batteries.
  • Examination of interfacial resistance and material brittleness as limitations.
  • Conceptualization of all- and quasi-solid-state battery designs using ICOFs.

Main Results:

  • ICOFs demonstrate potential as next-generation solid-state electrolytes due to their crystalline structure and ionic conductivity.
  • The primary limitation identified is high interfacial resistance stemming from the inherent brittleness of crystalline ICOFs.
  • Anionic and cationic COFs are being explored for their suitability in Li-based battery applications.

Conclusions:

  • ICOFs show significant promise for developing safe, high-energy-density solid-state LMBs.
  • Addressing the brittleness and interfacial resistance of ICOFs is crucial for their practical application.
  • Further research into ICOF-based solid-state electrolytes could enable the realization of advanced battery technologies.