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Related Concept Videos

Ionic Bonds00:42

Ionic Bonds

118.0K
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...
118.0K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

41.2K
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. 
41.2K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

16.9K
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...
16.9K
Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

62.3K
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.
62.3K
Ionic Strength: Overview01:12

Ionic Strength: Overview

1.3K
The ionic strength of a solution is a quantitative way of expressing the total electrolyte concentration of a solution. This concept was first introduced in 1921 by two American physical chemists, Gilbert N. Lewis and Merle Randall, while describing the activity coefficient of strong electrolytes. During the calculation of ionic strength (I or μ), all the cations and anions are considered. However, the concentration (c) of an ion with a greater charge number (z) has a greater contribution...
1.3K
Electrolysis03:00

Electrolysis

26.0K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.0K

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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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Coordination-Driven Crosslinking Electrolytes for Fast Lithium-Ion Conduction and Solid-State Battery Applications.

Xiao-Xue Wang1,2, De-Hui Guan1,2, Xin-Yue Ma1

  • 1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.

Angewandte Chemie (International Ed. in English)
|November 30, 2024
PubMed
Summary

This study introduces a novel solid polymer electrolyte using metal-organic polyhedra and cellulose copolymers for safer, high-energy rechargeable batteries. The new material enables rapid lithium-ion transport, enhancing battery performance and longevity.

Keywords:
Li-metal batteryLi−O2 batterypolymer electrolytessolid-state air cathodesolid-state electrolyte

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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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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Chemistry

Background:

  • Rechargeable batteries with lithium metal anodes offer high energy density but face safety issues due to lithium dendrites and flammable liquid electrolytes.
  • Developing stable, high-performance solid polymer electrolytes is crucial for advancing next-generation energy storage.
  • Current solid electrolytes often struggle with low ionic conductivity and limited electrochemical stability.

Purpose of the Study:

  • To engineer a novel coordination-driven crosslinked network for high-performance solid polymer electrolytes.
  • To enhance the safety and energy density of lithium-based rechargeable batteries.
  • To investigate the potential of metal-organic polyhedra (MOPs) in solid polymer electrolyte design.

Main Methods:

  • Synthesized a cellulose-based copolymer and coordinated it with metal-organic polyhedra (MOPs).
  • Engineered a hypercrosslinked MOP (CHMOP-Li) polymer network for lithium-ion (Li+) transport.
  • Fabricated solid-state lithium-metal and lithium-oxygen (Li-O2) batteries using the developed electrolyte.

Main Results:

  • Achieved high Li+ conductivity of 1.02×10-3 S cm-1 at 25 °C and a high Li+ transference number of 0.75.
  • Demonstrated a wide electrochemical stability window and excellent thermal stability of the CHMOP-Li electrolyte.
  • Prevented short-circuiting in symmetric batteries after 3200 h of cycling, reaching 300 Wh kg-1 in Li-metal batteries.
  • Solid-state Li-O2 batteries exhibited 500 cycles with a high discharge capacity of 15740 mAh g-1.

Conclusions:

  • The coordination-driven crosslinking strategy provides a viable route for designing advanced solid polymer electrolytes.
  • The CHMOP-Li electrolyte offers a promising solution for safe, high-energy-density rechargeable batteries.
  • This approach paves the way for next-generation sustainable battery technologies.