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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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Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
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An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
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A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
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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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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Li2 S- or S-Based Lithium-Ion Batteries.

Matthew Li1,2, Zhongwei Chen2, Tianpin Wu3

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Summary
This summary is machine-generated.

Lithium-sulfur (Li-S) batteries face commercialization hurdles due to safety concerns with lithium metal anodes. Alternative S-battery designs, particularly using lithium sulfide (Li2S) cathodes, show promise for safer, industrially viable room-temperature energy storage.

Keywords:
Li-S batteriesLi2S cathodeslithium-ion sulfur batterieslithium-metal batteriespolysulfides (PSs)

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Widespread commercialization of lithium-sulfur (Li-S) batteries is hindered by safety and stability issues associated with lithium metal anodes.
  • Alternative S-battery configurations, such as lithium-ion, Li2S, or S batteries, offer potential solutions by avoiding the use of lithium metal anodes.
  • These alternative designs aim to address safety concerns and improve cycle stability for room-temperature applications.

Purpose of the Study:

  • To evaluate the potential of S-based battery technologies for industrial adoption.
  • To compare lithium sulfide (Li2S) and sulfur (S) as initiating cathode materials in Li-anode-free battery configurations.
  • To highlight the advantages of using Li2S as a cathode material.

Main Methods:

  • Review and discussion of sulfur (S) and lithium sulfide (Li2S) as cathode materials in Li-anode-free battery systems.
  • Analysis of the benefits and drawbacks associated with each cathode choice.
  • Focus on identifying key advantages of Li2S for practical battery applications.

Main Results:

  • Li-anode-free S-battery configurations mitigate the safety and stability concerns inherent in traditional Li-S batteries.
  • Both S and Li2S present distinct advantages and disadvantages as cathode materials.
  • The study emphasizes the significant benefits offered by Li2S as an initiating cathode material.

Conclusions:

  • Lithium sulfide (Li2S) emerges as a promising cathode material for developing safer and more stable room-temperature S-based batteries.
  • Further research into Li2S-based cathodes is crucial for advancing the industrialization of next-generation battery technologies.
  • Li-anode-free battery designs represent a viable pathway towards overcoming current limitations in S-battery commercialization.