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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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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.
In this solution, the primary...
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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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Properties of Transition Metals02:58

Properties of Transition Metals

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Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
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Standard Electrode Potentials03:02

Standard Electrode Potentials

44.8K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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Electrolysis03:00

Electrolysis

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In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
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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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Thermal Stability between Sulfide Solid Electrolytes and Oxide Cathode.

Shuo Wang1,2, Yujing Wu3,1,2, Tenghuan Ma3,4

  • 1Beijing Advanced Innovation Center for Materials Genome Engineering, Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

ACS Nano
|October 11, 2022
PubMed
Summary

Solid electrolytes enhance lithium-ion battery safety by replacing liquid electrolytes. This study investigates sulfide solid electrolyte thermal stability and develops methods to improve safety by blocking interfacial reactions with oxide cathodes.

Keywords:
interfacial reactionsulfide all-solid-state batterysulfide solid electrolytethermal safetythermal stability

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Lithium-ion batteries face safety challenges due to high energy density demands.
  • Liquid electrolytes (LEs) pose safety risks; inorganic solid electrolytes (SEs) offer a safer alternative due to thermal stability and nonflammability.
  • Limited research exists on the thermal stability of highly reactive sulfide SEs.

Purpose of the Study:

  • To systematically evaluate the thermal stability of various sulfide SEs.
  • To investigate the interfacial reactions between sulfide SEs and oxide cathodes under different delithiation states.
  • To develop practical methods for enhancing the thermal stability of sulfide SE-based batteries.

Main Methods:

  • Development of simple experimental devices for thermal stability analysis.
  • Systematic study of thermodynamic and kinetic properties.
  • Testing of typical sulfide SEs (Li3PS4, Li7P3S11, Li6PS5Cl, LSPSCl, Li4SnS4) and Li1-xCoO2 cathodes.
  • Evaluation of interfacial reactions under varying delithiation states.

Main Results:

  • Comprehensive thermal stability data for key sulfide SEs.
  • Identification of thermochemical interfacial reactions between SEs and cathodes.
  • Demonstration of effective methods to mitigate interfacial reactions.
  • Enhanced thermal stability achieved through interface blocking.

Conclusions:

  • Sulfide SEs show promise for safer lithium-ion batteries.
  • Understanding and controlling interfacial reactions is crucial for thermal stability.
  • Developed methods offer practical solutions for improving battery safety.