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関連する概念動画

Intermolecular Forces03:13

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Induced Electric Dipoles01:28

Induced Electric Dipoles

A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
The Electrical Double Layer01:30

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
Lattice Energies of Ionic Crystals01:27

Lattice Energies of Ionic Crystals

Lattice energy represents the energy released when gaseous cations and anions combine to form an ionic solid, reflecting the strength of electrostatic interactions within the crystal. This process is fundamentally governed by Coulombic attraction between oppositely charged ions, where the potential energy varies inversely with the interionic distance and directly with the product of ionic charges. As ions approach one another, the electrostatic energy becomes increasingly negative, indicating a...

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

結晶ポリマー電解質におけるイオン伝導度

Z Gadjourova1, Y G Andreev, D P Tunstall

  • 1School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, UK.

Nature
|August 3, 2001
PubMed
まとめ
この要約は機械生成です。

結晶ポリマーの電解質のイオン伝導性は,無形相の電解質のイオン伝導性を上回る可能性があります. この発見は,リチウム電池用のポリマー電解質のイオン輸送を容易にするのは,無形領域のみであるという長年の信念に異議を唱える.

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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

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Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
06:34

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Published on: September 19, 2020

関連する実験動画

Last Updated: Jun 30, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
10:36

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Published on: April 12, 2018

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
06:34

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Published on: September 19, 2020

科学分野:

  • マテリアルサイエンス 材料科学
  • 電気化学 電気化学について
  • ポリマーサイエンスの科学

背景:

  • ポリマー電解質は,完全に固体状態のリチャージ可能なリチウム電池に不可欠です.
  • 伝統的に,イオン輸送は,ガラス化移行温度 (Tg) 以上にあるポリマー電解質の無形相においてのみ発生すると考えられていた.

研究 の 目的:

  • 結晶ポリマー電解質のイオン伝導性を調査する.
  • イオン輸送は無形相に限定されているという支配的な見解に異議を唱えるため.
  • バッテリーの性能を向上させるための結晶相の潜在能力を探求する.

主な方法:

  • 結晶と無形相を持つポリマー電解質の調製.
  • 両相におけるイオン伝導性の測定.
  • イオン輸送機構の分析.

主要な成果:

  • 結晶相におけるイオン伝導性は,Tg以上の無形相よりも大きいことが判明しました.
  • 結晶ポリマー電解質のイオン輸送は,カチオン (例えばリチウムイオン) が支配する可能性があります.
  • これは,両方のイオンが一般的に移動している無形相と対照的です.

結論:

  • 結晶ポリマー電解質内の秩序は,以前の仮定に反して,イオン輸送を促進することができます.
  • 結晶相におけるカチオン主導の輸送は,リチウム電池のアプリケーションに有利です.
  • この発見は,先進的なポリマー電解質の設計のための新しい道を開く.