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Related Concept Videos

Alkali Metals03:06

Alkali Metals

19.0K
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
19.0K
Ion Exchange01:17

Ion Exchange

421
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
421
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

304
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...
304
Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

1.3K
The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary...
1.3K
Ionic Bonds00:42

Ionic Bonds

117.4K
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...
117.4K
Ionic Crystal Structures02:42

Ionic Crystal Structures

14.0K
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...
14.0K

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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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A Core-Shell Structured Argyrodite-Type Electrolyte Enabling Elevated Chemical/Electrochemical Stability.

Shijie Lu1, Yuxiang Zhang1, Haijian Lv1

  • 1School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 10081, P.R. China.

Angewandte Chemie (International Ed. in English)
|May 9, 2025
PubMed
Summary

This study developed a novel core-shell sulfide solid electrolyte with enhanced chemical and electrochemical stability for all-solid-state batteries. The engineered material achieves high ionic conductivity and excellent cycling performance with a lithium cobalt oxide cathode.

Keywords:
Argyrodite electrolyteChemical stabilityCore‐shell structureHygroscopic shellInterface compatibility

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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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Determination of Thermodynamic Properties of Alkaline Earth-liquid Metal Alloys Using the Electromotive Force Technique
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Determination of Thermodynamic Properties of Alkaline Earth-liquid Metal Alloys Using the Electromotive Force Technique
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Area of Science:

  • Materials Science
  • Electrochemistry
  • Solid-State Chemistry

Background:

  • Sulfide solid electrolytes offer high ionic conductivity for all-solid-state batteries.
  • Poor chemical and electrochemical stability limits their large-scale application.

Purpose of the Study:

  • To develop a stable and highly conductive sulfide solid electrolyte.
  • To improve the electrochemical performance of all-solid-state batteries.

Main Methods:

  • Fabrication of a core-shell solid electrolyte with a Cl-gradient argyrodite core and LiCl shell.
  • Surface engineering of the solid electrolyte.
  • Electrochemical testing with LiCoO2 cathode and Li metal anode.

Main Results:

  • Achieved high ionic conductivity of 10.62 mS cm⁻¹.
  • Demonstrated remarkable chemical stability upon air exposure.
  • Exhibited excellent electrochemical stability (0-5 V vs. Li/Li⁺) and good compatibility with Li metal.
  • LiCoO2//solid electrolyte//Li cells showed 95.6% capacity retention over 500 cycles at 1 C.

Conclusions:

  • The core-shell structure effectively enhances chemical and electrochemical stability.
  • Surface engineering synergistically improves Li⁺ transport and ionic conductivity.
  • The developed solid electrolyte shows significant potential for high-performance all-solid-state batteries.