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Related Concept Videos

Theory of Metallic Conduction01:17

Theory of Metallic Conduction

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The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
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Types Of Superconductors01:28

Types Of Superconductors

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A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
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Electrical Conductivity01:13

Electrical Conductivity

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In perfect conductors, the electric field inside is always zero due to the abundance of free electrons, which nullify any field by flowing. As a result, any residual charge resides on the surface.
In a practical conductor, an applied electric field may be sustained, causing a flow of electrons, which produce a current. The differential form of the current, the current density, is related to the electric field.
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Band Theory02:35

Band Theory

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When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
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Superconductor01:24

Superconductor

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A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
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Electric Field Inside a Conductor01:20

Electric Field Inside a Conductor

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When a conductor is placed in an external electric field, the free charges in the conductor redistribute and very quickly reach electrostatic equilibrium. The resulting charge distribution and its electric field have many interesting properties, which can be investigated with the help of Gauss's law.
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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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Percolative Channels for Superionic Conduction in an Amorphous Conductor.

Ang Qiao1, Jinjun Ren2, Haizheng Tao1

  • 1State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan430070, China.

The Journal of Physical Chemistry Letters
|November 7, 2022
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Summary
This summary is machine-generated.

Researchers developed new amorphous solid electrolytes for all-solid-state batteries. These materials show high ionic conductivity and stability, overcoming key challenges in battery technology.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Solid-State Chemistry

Background:

  • All-solid-state batteries require high-performance solid electrolytes.
  • Current solid electrolytes face limitations in ionic conductivity and stability.

Purpose of the Study:

  • To develop novel amorphous solid electrolytes with improved performance.
  • To investigate the relationship between composition, structure, and ionic conductivity.

Main Methods:

  • Synthesis of amorphous xAgI·(1-x)Ag3PS4 conductors.
  • Solid-state nuclear magnetic resonance spectroscopy for structural analysis.
  • Ionic conductivity measurements and analysis using a continuum percolation model.

Main Results:

  • A series of amorphous conductors were successfully synthesized.
  • The sample with x = 0.8 showed the highest ionic conductivity (1.1 × 10-2 S cm-1) and excellent chemical stability.
  • Mixed disordered Ag3PS4 and AgI clusters were identified, with interconnecting AgI clusters facilitating superionic conduction.

Conclusions:

  • The developed amorphous conductors offer a promising pathway for high-performance solid electrolytes.
  • Understanding the role of interconnected AgI clusters is crucial for designing advanced materials.
  • These findings provide guidance for fabricating efficient solid electrolytes for all-solid-state batteries.