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Related Concept Videos

Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

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Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
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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.
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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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Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
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Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

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Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
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Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

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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.
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Updated: Dec 1, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Will Sulfide Electrolytes be Suitable Candidates for Constructing a Stable Solid/Liquid Electrolyte Interface?

Bo Fan1, Yanghai Xu1, Rui Ma2

  • 1Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.

ACS Applied Materials & Interfaces
|November 10, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed a stable interface for hybrid lithium-sulfur batteries using a solid electrolyte coating. This innovation enhances battery stability and performance, overcoming the shuttle effect for improved energy storage.

Keywords:
hybrid electrolytesinterfacial stabilityliquid-phase synthesislithium thiophosphateslithium−sulfur batteries

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Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Conversion-type batteries offer high capacity but suffer from poor stability due to the shuttle effect.
  • Solid-electrolyte separators can prevent mass exchange and mitigate the shuttle effect.
  • Achieving a stable interface between solid and liquid electrolytes is crucial for battery performance.

Purpose of the Study:

  • To investigate the interfacial stability between sulfide solid electrolytes and liquid electrolytes.
  • To develop a stable solid-electrolyte separator for hybrid lithium-sulfur batteries.
  • To improve the performance and stability of lithium-sulfur batteries.

Main Methods:

  • Formation of a protective layer of ether-solvated Li3PS4 at the sulfide/liquid electrolyte interface.
  • Design of a composite separator using β-Li3PS4-coated Li7P3S11.
  • Testing of hybrid lithium-sulfur batteries with the composite separator.

Main Results:

  • A stable interface with low resistance and limited side reactions was formed between β-Li3PS4 and ether-based liquid electrolytes.
  • The β-Li3PS4-coated Li7P3S11 separator demonstrated high ion conductivity and interfacial stability.
  • Hybrid Li-S batteries achieved a high discharge capacity of 1047 mA h g-1 and a 2.06 V plateau after 150 cycles.

Conclusions:

  • The formation of an ether-solvated Li3PS4 protective layer is key to achieving stable interfaces.
  • The developed composite separator enables high-performance hybrid lithium-sulfur batteries.
  • This approach effectively addresses the shuttle effect, enhancing battery longevity and capacity.