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Related Concept Videos

Weak Acid Solutions04:02

Weak Acid Solutions

44.1K
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. 
51.7K
Ionic Association01:28

Ionic Association

19
The ionic association is the association of oppositely charged ions in an electrolyte solution to form ion pairs. Bjerrum defined ion pairs as two oppositely charged ions whose electrostatic attraction exceeds the thermal energy of the system, typically expressed as 2kT. Electrostatic attraction depends on ionic charge, separation distance, and the dielectric constant of the medium. Thermal energy, represented by kT, reflects the tendency of ions to move independently due to molecular motion.
19
Formation of Complex Ions03:45

Formation of Complex Ions

26.5K
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...
26.5K
Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

72.6K
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.
72.6K
Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

68.6K
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.
68.6K

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Coatable Li4 SnS4 Solid Electrolytes Prepared from Aqueous Solutions for All-Solid-State Lithium-Ion Batteries.

Young Eun Choi1, Kern Ho Park1, Dong Hyeon Kim1

  • 1School of Energy and Chemical Engineering, Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea.

Chemsuschem
|May 9, 2017
PubMed
Summary

Researchers developed a scalable aqueous-solution process for highly conductive solid electrolytes (Li4SnS4) to improve all-solid-state lithium-ion batteries (ASLBs). Coating active materials with these electrolytes significantly enhances ASLB performance for energy storage.

Keywords:
batteriesconductivitysolid electrolytessolution processessulfides

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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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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • All-solid-state lithium-ion batteries (ASLBs) offer superior safety for large-scale energy storage compared to conventional lithium-ion batteries (LIBs).
  • Key limitations in bulk-type ASLBs include low ionic conductivity of solid electrolytes (SEs) and poor interfacial contact between active materials and SEs.

Purpose of the Study:

  • To develop highly conductive and stable solid electrolytes for improved ASLB performance.
  • To investigate a scalable synthesis method for solid electrolytes using aqueous solutions.
  • To enhance the electrochemical performance of ASLBs by optimizing the interface between active materials and solid electrolytes.

Main Methods:

  • Synthesis of lithium thiophosphate solid electrolytes (Li4SnS4) via a scalable aqueous-solution process.
  • Coating of active material (LiCoO2) with the synthesized Li4SnS4 solid electrolyte.
  • Electrochemical characterization of the modified ASLBs to evaluate performance.

Main Results:

  • Achieved highly conductive (0.14 mS cm−1) and dry-air-stable Li4SnS4 solid electrolytes.
  • Demonstrated significant improvement in the electrochemical performance of ASLBs utilizing Li4SnS4-coated LiCoO2.
  • Minimized detrimental side-effects of aqueous solution exposure on LiCoO2 by employing predissolved Li4SnS4 solutions.

Conclusions:

  • Scalable aqueous-solution synthesis provides a viable route to high-performance solid electrolytes for ASLBs.
  • Optimizing the solid electrolyte/active material interface is crucial for enhancing ASLB electrochemical performance.
  • This approach offers a promising strategy for developing safer and more efficient large-scale energy storage solutions.