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Related Concept Videos

Alkali Metals03:06

Alkali Metals

19.8K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
19.8K
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

465
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
465
Bonding in Metals02:32

Bonding in Metals

47.9K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
47.9K
Ions as Acids and Bases02:54

Ions as Acids and Bases

24.0K
Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
24.0K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

42.2K
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. 
42.2K
Ionic Bonds00:42

Ionic Bonds

120.8K
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...
120.8K

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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 Conductive and Highly-Stable Interface for Alkali Metal Anodes.

Enzhong Jin1, Karnpiwat Tantratian2, Changtai Zhao1

  • 1Department of Mechanical and Materials Engineering, University of Western Ontario, London, ON, N6A 5B9, Canada.

Small (Weinheim an Der Bergstrasse, Germany)
|July 23, 2022
PubMed
Summary
This summary is machine-generated.

This study developed a universal atomic layer deposition (ALD) method to create ionic conductive interfaces for lithium and sodium metal anodes, effectively suppressing dendrite formation and enhancing battery performance.

Keywords:
alkali metal anodesatomic layer depositioninterface engineeringnext generation batteries

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Alkali metal anodes offer high capacity but suffer from dendrite formation and interface instability.
  • The solid electrolyte interphase (SEI) critically influences alkali metal deposition and battery performance.
  • Developing stable and conductive interfaces is crucial for next-generation batteries.

Purpose of the Study:

  • To develop a facile and universal method for fabricating ionic conductive interfaces for lithium and sodium metal anodes.
  • To investigate the influence of atomic layer deposition (ALD) parameters on coating properties.
  • To demonstrate the effectiveness of these interfaces in improving electrochemical performance.

Main Methods:

  • Modified atomic layer deposition (ALD) using alkali metals as precursors.
  • Characterization of coating composition and structure.
  • Electrochemical testing of modified anodes.
  • Electrochemical phase-field modeling.

Main Results:

  • Successfully fabricated ionic conductive coatings on Li and Na metal anodes using a universal ALD approach.
  • Optimized ALD deposition temperature influenced coating composition and structure, leading to improved electrochemical performance.
  • Phase-field modeling confirmed the coatings promote uniform electrodeposition and suppress dendrites.

Conclusions:

  • The developed ALD method provides a universal strategy for stabilizing alkali metal anodes.
  • Ionic conductive coatings significantly enhance the electrochemical performance and cycle life of Li and Na metal batteries.
  • This approach is adaptable for various metal anodes, coatings, and deposition techniques.