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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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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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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Updated: Jul 23, 2025

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

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Rationally Designed Solution-Processible Conductive Carbon Additive Coating for Sulfide-based All-Solid-State

Nohjoon Lee1, Jieun Lee1, Taegeun Lee1

  • 1School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.

ACS Applied Materials & Interfaces
|July 17, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed a new zinc oxide (ZnO) coating for carbon fiber conductive agents in sulfide-based all-solid-state batteries (ASSBs). This coating enhances battery performance and lifespan by preventing solid electrolyte decomposition.

Keywords:
all-solid-state batteriesconductive carbon additivesolvothermal synthesissulfide solid electrolytesurface coating

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Sulfide-based all-solid-state batteries (ASSBs) offer high safety and energy density for next-generation energy storage.
  • Conductive agents in ASSB cathodes can degrade solid electrolytes, limiting battery life.

Purpose of the Study:

  • To develop a novel conductive agent that minimizes solid electrolyte decomposition in ASSBs.
  • To improve the cycling performance and rate capability of sulfide-based ASSBs.

Main Methods:

  • Solution-processible coating of zinc oxide (ZnO) onto vapor-grown carbon fiber.
  • Fabrication and electrochemical testing of ASSBs using the modified conductive agent.
  • Analysis of interfacial contact and electrolyte decomposition.

Main Results:

  • The ZnO-coated carbon fiber effectively reduced direct contact between the conductive agent and solid electrolyte.
  • ASSBs with optimal ZnO coating exhibited significantly improved cycling performance and rate capability.
  • The enhanced performance was attributed to the suppression of solid electrolyte decomposition.

Conclusions:

  • Controlling interparticle contacts in composite cathodes is crucial for mitigating interfacial degradation in sulfide-based ASSBs.
  • The ZnO coating strategy presents a viable approach to enhance the electrochemical properties and longevity of ASSBs.