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Related Concept Videos

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Batteries and Fuel Cells

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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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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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In ordinary chemical reactions, the nucleus — which contains the protons and neutrons of each atom and thus identifies the element — remains unchanged. Electrons, however, can be added to atoms by transfer from other atoms, lost by transfer to other atoms, or shared with other atoms. The transfer and sharing of electrons among atoms govern the chemistry of the elements. During the formation of some compounds, atoms gain or lose electrons to form electrically charged particles called...
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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.
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Updated: Dec 30, 2025

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Research Development on K-Ion Batteries.

Tomooki Hosaka1, Kei Kubota1,2, A Shahul Hameed1,2

  • 1Department of Applied Chemistry, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan.

Chemical Reviews
|January 16, 2020
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Summary
This summary is machine-generated.

Potassium-ion batteries (KIBs) offer a sustainable alternative to lithium-ion batteries (LIBs), utilizing earth-abundant materials. KIBs demonstrate competitive performance and faster ion diffusion, addressing resource concerns.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Lithium-ion batteries (LIBs) dominate energy storage but face resource limitations (Li, Co).
  • Growing demand for sustainable and scalable energy storage solutions is critical.
  • Earth-abundant element-based batteries are sought as alternatives to LIBs.

Purpose of the Study:

  • To comprehensively review electrochemical materials for potassium-ion batteries (KIBs).
  • To discuss recent advancements, challenges, and future perspectives in KIB development.
  • To compare KIBs with lithium-ion batteries (LIBs) and sodium-ion batteries (NIBs).

Main Methods:

  • Literature review of KIB electrode and electrolyte materials.
  • Analysis of KIB electrochemical properties, including ionic diffusion and electrode potentials.
  • Comparative study of KIBs against LIBs and NIBs.

Main Results:

  • KIBs utilize earth-abundant materials, avoiding scarce/toxic elements.
  • KIBs exhibit low standard electrode potentials, enabling high operation voltages comparable to LIBs.
  • Potassium ions (K+) show faster ionic diffusion in electrolytes than lithium ions (Li+).

Conclusions:

  • KIBs present a promising alternative to LIBs due to material abundance and performance.
  • Further research into electrode reactions, solid-state ionics, and nonaqueous chemistry is needed.
  • KIBs offer a viable path towards sustainable and high-power energy storage systems.