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Related Concept Videos

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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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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Spontaneous Chemical Reactions
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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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Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
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Related Experiment Video

Updated: Jul 26, 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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Stable Interface between Sulfide Solid Electrolyte and Room-Temperature Liquid Lithium Anode.

Jian Peng1,2,3,4, Dengxu Wu1,2,3,4, Zhiwen Jiang1,2

  • 1Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang 213300, Jiangsu, People's Republic of China.

ACS Nano
|June 23, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed protective layers for solid electrolytes (SEs) to improve battery stability. This breakthrough enables over 1000 hours of stable cycling for solid-state batteries, enhancing safety and performance.

Keywords:
PEOorganic liquid electrode Li-BP-DMEsolid−liquid interfacesulfide solid electrolyteβ-Li3PS4/S

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Solid-State Batteries

Background:

  • Sulfide solid electrolytes (SEs) offer high ionic conductivity and mechanical ductility, making them promising for solid-state batteries.
  • A major challenge is high interfacial impedance caused by poor chemical/electrochemical stability between SEs and electrodes.
  • Interface stability is critical for the performance and commercialization of sulfide solid-state batteries.

Purpose of the Study:

  • To address the critical issue of interfacial instability in solid-state batteries utilizing sulfide electrolytes.
  • To develop effective interface protective layers for stable operation of batteries with sulfide solid electrolytes and liquid lithium anodes.
  • To achieve long-term stable cycling performance by mitigating interfacial side reactions.

Main Methods:

  • Investigated the formation and evolution of the electrode/sulfide SE interface during battery assembly and cycling.
  • Applied compatible interface protective layers, including polyethylene oxide (PEO) and β-Li3PS4/S, between sulfide SEs and ether-based liquid lithium anodes.
  • Evaluated the long-term cycling stability of the assembled solid-state batteries.

Main Results:

  • Successfully formed compatible interface protective layers (PEO and β-Li3PS4/S) between sulfide SEs and liquid lithium anodes.
  • Achieved long-term stable cycling performance exceeding 1000 hours.
  • Demonstrated the stabilization of the solid-liquid interface, effectively solving the problem of interfacial side reactions.

Conclusions:

  • The developed interface protection strategy significantly enhances the interfacial chemical/electrochemical stability between sulfide SEs and liquid lithium anodes.
  • This method enables safe and stable long-cycle operation of solid-state batteries, overcoming a key barrier to commercialization.
  • The findings pave the way for practical applications of high-performance sulfide solid-state batteries.