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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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Weak Acid Solutions04:02

Weak Acid Solutions

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Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
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Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

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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. 
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Ladder Diagrams: Redox Equilibria01:30

Ladder Diagrams: Redox Equilibria

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Ladder diagrams are useful tools for understanding redox equilibrium reactions, especially the effects of concentration changes on the electrochemical potential of the reaction. The vertical axis in the redox ladder diagrams represents the electrochemical potential, E. The area of predominance is demarcated using the Nernst equation.
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
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Formation of Complex Ions03:45

Formation of Complex Ions

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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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Structure and Nomenclature of Thiols and Sulfides02:17

Structure and Nomenclature of Thiols and Sulfides

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Thiols and sulfides are sulfur analogs of alcohols and ethers, respectively, where the sulfur atom takes the place of the oxygen atom. Thus, thiols are generally represented as RSH, where R is an alkyl substituent and —SH is the functional group. On the other hand, in sulfides, the central sulfur atom is bonded to two hydrocarbon groups on either side. Depending upon the type of group, sulfides can be either symmetrical or asymmetrical. Both thiols and sulfides display a bent geometry,...
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Related Experiment Video

Updated: Nov 15, 2025

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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Organosulfide-Based Deep Eutectic Electrolyte for Lithium Batteries.

Jiahan Song1, Yubing Si1, Wei Guo1

  • 1College of Chemistry, Zhengzhou University, Zhengzhou, 450001, P. R. China.

Angewandte Chemie (International Ed. in English)
|March 2, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces novel deep eutectic electrolytes (DEEs) utilizing Li-N interactions, enhancing safety and ionic conductivity for advanced lithium-ion batteries. These new DEEs offer improved performance and stability.

Keywords:
2,2′-dipyridyl disulfideLiTFSIdeep eutectic electrolyteionic conductivitylithium iron phosphate

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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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
  • Chemical Engineering

Background:

  • Deep eutectic electrolytes (DEEs) offer unique properties but are often limited by Li-O interactions.
  • Expanding the chemical diversity of DEEs is crucial for developing next-generation energy storage solutions.

Purpose of the Study:

  • To develop a new class of DEEs based on Li-N interactions.
  • To investigate the electrochemical properties and safety of these novel DEEs.

Main Methods:

  • Synthesized DEEs using 2,2'-dipyridyl disulfide (DpyDS) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI).
  • Characterized DEEs for ionic conductivity, electrochemical stability, and safety (flammability).
  • Evaluated performance in a Li/LiFePO4 half-cell at 50°C.

Main Results:

  • A new DEE system was successfully created via Li-N interactions, overcoming limitations of Li-O interactions.
  • The DEE with a DpyDS:LiTFSI molar ratio of 4:1 (DEE-4:1) demonstrated intrinsic safety and non-flammability.
  • DEE-4:1 exhibited electrochemical stability from 2.1 to 4.0 V vs. Li/Li+, with an ionic conductivity of 1.5×10⁻⁴ S/cm at 50°C.
  • The Li/LiFePO4 half-cell using DEE-4:1 achieved a reversible capacity of 130 mAh/g and >98% Coulombic efficiency at 50°C.

Conclusions:

  • The novel Li-N based DEEs present a promising alternative to conventional electrolytes.
  • These DEEs exhibit enhanced safety features and suitable electrochemical performance for lithium-ion batteries.